The thing that did the trick for me eventually was:

    yum install gd gd-devel php-gd

and then restart apache:

    service httpd restart

 1. You need to find a repo that offers a GD lib matching your current php version. I&#39;ve had great success using [Remi Collet&#39;s repo](http://blog.famillecollet.com/pages/Config-en) for this purpose. In fact, I used it yesterday to update my php install to the latest 5.4.0RC6 version on my CentOS6 box.
 2. Once you&#39;ve setup the repo it&#39;s a simple matter of running `sudo yum install php-gd`
 3. Of course, the usual things apply: make sure you restart apache after installing, etc.

With CentOS 6.5+ and PHP 5.5:

    yum install php55u-gd
    service httpd restart

If you get an error like: `cannot map zero-fill pages: Cannot allocate memory in Unknown on line 0`, it could be because you don&#39;t have a swap file. I suggest you take a look at the tutorial mentioned in this answer: https://stackoverflow.com/a/20275282/828366

Tutorial: https://www.digitalocean.com/community/articles/how-to-add-swap-on-centos-6

**CentOs 6.5+ &amp; PHP 5.6:**

    sudo yum install php56-gd

    service httpd restart

Put the command

    yum install php-gd

and restart the server (httpd, nginx, etc)

    service httpd restart

For PHP7 on CentOS or EC2 Linux AMI:

    sudo yum install php70-gd

I am writing an app where it is desirable to check if a view does *not* have some functionality - in particular because that functionality must be presented only to users in certain security group. I am looking for the opposite of assert_selects in order to see that a menu is *not* rendered.

The opposite of assert_select?

I&#39;m developing an iPhone app. In a label, I want to show an user&#39;s first letter of the name uppercase. How do I do that?

How to make first letter uppercase in a UILabel?

How do I go about enabling GD Support in a CentOS Installation?

CentOS: Enabling GD Support in PHP Installation

<p>How do I go about enabling GD Support in a CentOS Installation?</p>


How is proper way to store an array in a cookie? in PHP
Code example:

    $number_ticket=2;
    $info[7][5]=1;
    $info[8][5]=1;



Storing PHP arrays in cookies

I&#39;m working on the display of the stock availability on the (individual) product page of my Magento theme, and there&#39;s something I don&#39;t completely understand about this.

I see two methods being used in the templates to check whether a product is available for sale:
```php
    Mage_Catalog_Model_Product::isAvailable()
    Mage_Catalog_Model_Product::isSaleable()
```
**My own findings:**  
I see that `isSalable()` (which in turn is called by `isSaleable()`) calls `isAvailable()` but also dispatches two events (`catalog_product_is_salable_before` and `catalog_product_is_salable_after`).

On the frontend, I&#39;ve noticed that in Magento&#39;s base template `isAvailable()` is used to decide whether to display the product as &quot;in stock&quot; or &quot;out of stock&quot;; `isSaleable()` is used to decide something like whether to show an &quot;Add to Cart&quot; button.

On the backend, I&#39;ve noticed that when the stock quantity becomes zero and backorders are *not* allowed, the stock availability of a product goes to &quot;out of stock&quot;.
When the stock quantity becomes zero and backorders *are* allowed, the stock availability of the product remains unchanged.

**Question:**  
The properties &quot;stock availability&quot; and &quot;stock quantity&quot; are obviously linked with each other and the mentioned PHP methods. I would like to know: 

 - what the *semantic* difference between the PHP methods `isAvailable()` and
   `isSaleable()` is and why I would use one over the other;

 - what it is I appear not yet to know about their relation with these properties and Magento&#39;s behavior.

Thank you.

**EDIT:**  
I&#39;ve tried every relevant combination of stock quantity (-1,0,1), stock availability (in/out of), and backorders (on/off) for a product and this is the result:

&lt;pre&gt;
St.Qu  BckOrd  St.Av  isSalable()  isSaleable()  isAvailable()
   -1       0      0            0             0              0
   -1       0      1          N/A           N/A            N/A
   -1       1      0            0             0              0
   -1       1      1            1             1              1
    0       0      0            0             0              0
    0       0      1          N/A           N/A            N/A
    0       1      0            0             0              0
    0       1      1            1             1              1
    1       0      0            0             0              0
    1       0      1            1             1              1
    1       1      0            0             0              0
    1       1      1            1             1              1
&lt;/pre&gt;

Just for the sake of completeness:  
```php
St.Av 0  = out of stock
St.Av 1  = in stock
BckOrd 0 = no backorders allowed
BckOrd 1 = backorders are allowed

```
It is the stock availability switch in Magento that controls the return value of all of the PHP methods, but when backorders are off and stock quantity drops below 1, the stock availability will automatically be reset to &#39;out of stock&#39; (hence the `N/A` rows).

What is the difference between isSaleable() and isAvailable()?

I have a PHP function in a Drupal 6 .module file.  I am attempting to run initial variable validations prior to executing more intensive tasks (such as database queries). In C#, I used to implement IF statements at the beginning of my Try block that threw new exceptions if a validation failed.  The thrown exception would be caught in the Catch block.  The following is my PHP code:

    function _modulename_getData($field, $table) {
      try {
        if (empty($field)) {
          throw new Exception(&quot;The field is undefined.&quot;); 
        }
        // rest of code here...
      }
      catch (Exception $e) {
        throw $e-&gt;getMessage();
      }
    }

However, when I try to run the code, it&#39;s telling me that objects can only be thrown within the Catch block.

Thanks in advance!

Throwing exceptions in a PHP Try Catch block

I want to automate a fairly simple task. For this I have written a small PHP script which I run from the command line using PHP-CLI. Now I want to hand over this script to someone but I do not want to:

 - give away the source code
 - ask him to install PHP on the system

Is there a way to create a .exe version of the PHP script. I am really not much worried about de-compilation; I am more worried about asking people to install and configure PHP.

Convert a PHP script into a stand-alone windows executable

Why does the following code output 0?

It works with numbers instead of strings just fine. I have similar code in JavaScript that also works. Does PHP not like += with strings?

    &lt;?php
        $selectBox = &#39;&lt;select name=&quot;number&quot;&gt;&#39;;
        for ($i=1; $i&lt;=100; $i++)
        {
            $selectBox += &#39;&lt;option value=&quot;&#39; . $i . &#39;&quot;&gt;&#39; . $i . &#39;&lt;/option&gt;&#39;;
        }
        $selectBox += &#39;&lt;/select&gt;&#39;;

        echo $selectBox;
    ?&gt;


Can you append strings to variables in PHP?

I am trying to rsync directory A of server1 with directory B of server2.

Sitting in the directory A of server1, I ran the following commands.

    rsync -av * server2::sharename/B

but the interesting thing is, it synchronizes all files and directories except .htaccess or any hidden file in the directory A. Any hidden files within subdirectories get synchronized.

I also tried the following command:

    rsync -av --include=&quot;.htaccess&quot; * server2::sharename/B

but the results are the same.

Any ideas why hidden files of A directory are not getting synchronized and how to fix it. I am running as root user.

thanks



rsync not synchronizing .htaccess file

I am on a server that has  afresh install on RHEL 5.  I was able to install Apache and PHP just fine., but I am having serious trouble with my MySQL installation.  I tried the following:

    yum install mysql-server mysql 

And didn&#39;t get any errors or conflicts.  Then I tried to start mysql with the following commands:

    chkconfig --levels 235 mysqld on
    service mysqld start

And get `Timeout error occurred trying to start MySQL Daemon.`  

I checked my logs and see this error:

    [ERROR] Fatal error: Can&#39;t open and lock privilege tables: Table &#39;mysql.host&#39; doesn&#39;t exist

I&#39;m not sure where to go from here.

For reference I am using RHEL 5 and installed the latest versions of PHP 5 and Apache.


Fatal error: Can&#39;t open and lock privilege tables: Table &#39;mysql.host&#39; doesn&#39;t exist

Below is my code for creating a symlink of a directory:

    sudo ln -s /usr/local/nginx/conf/ /etc/nginx

I already created the directory `/etc/nginx`.  I just want the contents of the source directory (`/usr/local/nginx/conf/`) to be in the contents of the target directory (`/etc/nginx`). But when I execute the code, `/etc/nginx` contains a directory called `conf`, instead of the contents of `conf`. That directory contains the contents I want, but in the wrong location.

Why did it put a directory in the target folder, instead of just putting the contents of the directory in the target folder?

Create a symbolic link of directory in Ubuntu

I&#39;ve looked over several questions on Stack Overflow for how to convert spaces to tabs without finding what I need. There seem to be more questions about how to convert tabs to spaces, but I&#39;m trying to do the opposite.

In `Vim` I&#39;ve tried `:retab` and `:retab!` without luck, but I believe those are actually for going from tabs to spaces anyways.

I tried both `expand` and `unexpand` at the command prompt without any luck.

Here is the file in question:

http://gdata-python-client.googlecode.com/hg-history/a9ed9edefd61a0ba0e18c43e448472051821003a/samples/docs/docs_v3_example.py

How can I convert **leading** spaces to tabs using either `Vim` or the shell?


How can I convert spaces to tabs in Vim or Linux?

I need a platform independent (Linux/Unix|OSX) shell/bash command that will determine if a specific process is running. e.g. `mysqld`, `httpd`...
What is the simplest way/command to do this?

Linux/Unix command to determine if process is running?

    PHP Fatal error:  Class &#39;PDO&#39; not found in /home/bd/public_html/app/webroot/Cake/Model/Datasource/Database/Mysql.php on line 177

PHP INFO:

    PDO
    
    PDO support =&gt; enabled
    PDO drivers =&gt; sqlite, sqlite2, mysql
    
    pdo_mysql
    
    PDO Driver for MySQL =&gt; enabled
    Client API version =&gt; 5.5.24
    
    Directive =&gt; Local Value =&gt; Master Value
    pdo_mysql.default_socket =&gt; /var/lib/mysql/mysql.sock =&gt; /var/lib/mysql/mysql.sock
    
    pdo_sqlite
    
    PDO Driver for SQLite 3.x =&gt; enabled
    SQLite Library =&gt; 3.7.7.1


PHP INI:

    extension=pdo.so
    extension=pdo_sqlite.so
    extension=sqlite.so
    extension=pdo_mysql.so

CODE:

    /**
     * Check whether the MySQL extension is installed/loaded
     *
     * @return boolean
     */
            public function enabled() {
                    return in_array(&#39;mysql&#39;, PDO::getAvailableDrivers());
            }


Ideas as to why I&#39;m getting this error?

PHP 5.3.15
CloudLinux/CentOS 6
CPanel

PHP Fatal error: Class &#39;PDO&#39; not found

I&#39;m struggling to write readable and easy to understand documentation that describes the multi-tree structure for Array options that are passed to a function.

Here is an example array structure.

    $arr = [
       &#39;fields&#39; =&gt; [
           &#39;title&#39; =&gt; [
               &#39;name&#39;     =&gt; &#39;Document.title&#39;,
               &#39;format&#39;   =&gt; &#39;string&#39;,
               &#39;readonly&#39; =&gt; true
           ]
       ]
    ];

There are many possible options for the above array, but this is used as a parameter to a function that understands that structure.

    function doSomething(array $arr) { ... }

I&#39;d like to document how the array should be structured in PHPDoc, but I&#39;m not sure what the correct approach is.

Here is what I have now.

	/**
	 * Holds configuration settings for each field in a model.
	 * Defining the field options
	 *
	 * array[&#39;fields&#39;] array Defines the feilds to be shown by scaffolding.
	 * array[&#39;fields&#39;][fieldName] array Defines the options for a field, or just enables the field if array is not applied.
	 * array[&#39;fields&#39;][fieldName][&#39;name&#39;] string Overrides the field name (default is the array key)
	 * array[&#39;fields&#39;][fieldName][&#39;model&#39;] string (optional) Overrides the model if the field is a belongsTo assoicated value.
	 * array[&#39;fields&#39;][fieldName][&#39;width&#39;] string Defines the width of the field for paginate views. Examples are &quot;100px&quot; or &quot;auto&quot;
	 * array[&#39;fields&#39;][fieldName][&#39;align&#39;] string Alignment types for paginate views (left, right, center)
	 * array[&#39;fields&#39;][fieldName][&#39;format&#39;] string Formatting options for paginate fields. Options include (&#39;currency&#39;,&#39;nice&#39;,&#39;niceShort&#39;,&#39;timeAgoInWords&#39; or a valid Date() format)
	 * array[&#39;fields&#39;][fieldName][&#39;title&#39;] string Changes the field name shown in views.
	 * array[&#39;fields&#39;][fieldName][&#39;desc&#39;] string The description shown in edit/create views.
	 * array[&#39;fields&#39;][fieldName][&#39;readonly&#39;] boolean True prevents users from changing the value in edit/create forms.
	 * array[&#39;fields&#39;][fieldName][&#39;type&#39;] string Defines the input type used by the Form helper (example &#39;password&#39;)
	 * array[&#39;fields&#39;][fieldName][&#39;options&#39;] array Defines a list of string options for drop down lists.
	 * array[&#39;fields&#39;][fieldName][&#39;editor&#39;] boolean If set to True will show a WYSIWYG editor for this field.
	 * array[&#39;fields&#39;][fieldName][&#39;default&#39;] string The default value for create forms.
	 *
	 * @param array $arr (See above)
	 * @return Object A new editor object.
	 **/

My problem is that when the HTML document is generated, it&#39;s not formatted very nicely. Additionally, I&#39;m not sure the above is clearly explains the array structure.

Is there an alternative approach?

Best way to document Array options in PHPDoc?

I&#39;m getting the following error in my CakePHP application:

Request exceeded the limit of 10 internal redirects due to probable configuration error. Use &#39;LimitInternalRecursion&#39; to increase the limit if necessary. Use &#39;LogLevel debug&#39; to get a backtrace., referer: http://projectname.dev/

My .htaccess in the root folder, looks like this:

    &lt;IfModule mod_rewrite.c&gt;
       RewriteEngine on
       RewriteRule    ^$ app/webroot/    [L]
       RewriteRule    (.*) app/webroot/$1 [L]
    &lt;/IfModule&gt;

and in the app folder:

    &lt;IfModule mod_rewrite.c&gt;
        RewriteEngine on
        RewriteRule    ^$    webroot/    [L]
        RewriteRule    (.*) webroot/$1    [L]
    &lt;/IfModule&gt;

and in the webroot folder:

    &lt;IfModule mod_rewrite.c&gt;
      RewriteEngine On
      RewriteBase /projectname
      RewriteCond %{REQUEST_FILENAME} !-d
      RewriteCond %{REQUEST_FILENAME} !-f
      RewriteRule ^(.*)$ index.php?url=$1 [QSA,L]
    &lt;/IfModule&gt;

I was following this tutorial:

http://book.cakephp.org/2.0/en/getting-started.html

Request exceeded the limit of 10 internal redirects due to probable configuration error

I am starting to pick up PHP / MySQL, but in all the documentation I&#39;m reading, it mentions `/var/www/html` as being the folder you want to install a framework such as CakePHP, or for example /var/www/html being the folder you want to install your website on, so that everything is in root.

What exactly does `/var/www/html` mean?

What is /var/www/html?

I am trying to check if an element is not in array than want to redirect page:
My code is as below:

    $id = $access_data[&#39;Privilege&#39;][&#39;id&#39;]; 
    
    if(!in_array($id,$user_access_arr))
    {
        $this-&gt;Session-&gt;setFlash(__(&#39;Access Denied! You are not eligible to access this.&#39;), &#39;flash_custom_success&#39;);
        return $this-&gt;redirect(array(&#39;controller&#39;=&gt;&#39;Dashboard&#39;,&#39;action&#39;=&gt;&#39;index&#39;));
    }

I am confused how to check if element is not in array.
As we can check element exist or not in array using `in_array` function of PHP.
I am trying to check it using `(!in_array)` but I did not got result.



How to check not in array element

I’ve searched for this and the solutions provided in past questions are completely incomprehensible to me. Whenever I run functions like `imagecreatefromjpeg`, I get this:

&gt; Fatal error: Call to undefined function imagecreatefromjpeg() ...

I’m working on a new install of PHP; my last installation never had this problem. I don’t get what’s going on.

imagecreatefromjpeg and similar functions are not working in PHP

These all seem to do the same thing.
What are the pros/cons of each.

imagecopyresized() vs imagecopyresampled() vs imagecopy().

I&#39;m resizing a user submitted image. 

So I have an image shell created with &#39;$newImage=imagecreatetruecolor(250, 250)&#39;.

And now I want to copy the orginal image into the &#39;$newImage&#39;



php imagecopyresized vs imagecopyresampled vs imagecopy pros/cons

Recently the new php7 has been released. However, when I am trying to install the gd package, the library can not be found.

I have tried through

    sudo apt-get install php70-gd 
and

    sudo apt-get install php70-php-gd

Does anybody have an idea if gd is available for php 7?

install php70-gd on ubuntu

I newly install Dompdf in Laravel Project via Composer (`composer require barryvdh/laravel-dompdf`). After enter the Command Terminal Reply Following Errors.


    Problem 1
        - dompdf/dompdf v0.7.0 requires ext-gd * -&gt; the requested PHP extension gd is missing from your system.
        - barryvdh/laravel-dompdf v0.7.0 requires dompdf/dompdf ^0.7 -&gt; satisfiable by dompdf/dompdf[v0.7.0].
        - Installation request for barryvdh/laravel-dompdf ^0.7.0 -&gt; satisfiable by barryvdh/laravel-dompdf[v0.7.0].
    
      To enable extensions, verify that they are enabled in those .ini files:
        - /etc/php/5.6/cli/php.ini
        - /etc/php/5.6/cli/conf.d/10-opcache.ini
        - /etc/php/5.6/cli/conf.d/10-pdo.ini
        - /etc/php/5.6/cli/conf.d/15-xml.ini
        - /etc/php/5.6/cli/conf.d/20-calendar.ini
        - /etc/php/5.6/cli/conf.d/20-ctype.ini
        - /etc/php/5.6/cli/conf.d/20-dom.ini
        - /etc/php/5.6/cli/conf.d/20-exif.ini
        - /etc/php/5.6/cli/conf.d/20-fileinfo.ini
        - /etc/php/5.6/cli/conf.d/20-ftp.ini
        - /etc/php/5.6/cli/conf.d/20-gettext.ini
        - /etc/php/5.6/cli/conf.d/20-iconv.ini
        - /etc/php/5.6/cli/conf.d/20-json.ini
        - /etc/php/5.6/cli/conf.d/20-mbstring.ini
        - /etc/php/5.6/cli/conf.d/20-phar.ini
        - /etc/php/5.6/cli/conf.d/20-posix.ini
        - /etc/php/5.6/cli/conf.d/20-readline.ini
        - /etc/php/5.6/cli/conf.d/20-shmop.ini
        - /etc/php/5.6/cli/conf.d/20-simplexml.ini
        - /etc/php/5.6/cli/conf.d/20-sockets.ini
        - /etc/php/5.6/cli/conf.d/20-sysvmsg.ini
        - /etc/php/5.6/cli/conf.d/20-sysvsem.ini
        - /etc/php/5.6/cli/conf.d/20-sysvshm.ini
        - /etc/php/5.6/cli/conf.d/20-tokenizer.ini
        - /etc/php/5.6/cli/conf.d/20-wddx.ini
        - /etc/php/5.6/cli/conf.d/20-xmlreader.ini
        - /etc/php/5.6/cli/conf.d/20-xmlwriter.ini
        - /etc/php/5.6/cli/conf.d/20-xsl.ini
      You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

How to Solve this Error

I already Installed GD using Following comment. `sudo apt-get install php5-gd` and also Apache Server Restarted. My Laravel Version is 5.3 and Ubuntu Version is 14.04

Extension gd is missing from your system - laravel composer Update

I am using

    mount -o bind /some/directory/here /foo/bar

I want to check `/foo/bar` though with a bash script, and see if its been mounted? If not, then call the above mount command, else do something else. How can I do this?

CentOS is the operating system.

Check if directory mounted with bash

I tried to restart my Apache server on CentOS 5.0 and got this message:

&gt; httpd: Could not reliably determine the server&#39;s fully qualified domain name, using 127.0.0.1 for ServerName

Here is the `/etc/hosts` file:

    127.0.0.1    server4-245    server4-245.com    localhost.localdomain localhost
    ::1        localhost6.localdomain6 localhost6

Here is the `/etc/sysconfig/network` file:

    NETWORKING=yes
    NETWORKING_IPV6=no
    HOSTNAME=server4-245

I also have this in the Apache httpd.conf file:

    ServerName localhost

However, I still get the first error message when I restart Apache.

httpd: Could not reliably determine the server&#39;s fully qualified domain name, using 127.0.0.1 for ServerName

How do I install mbstring with PHP on CentOS 6.2

I&#39;ve tried:

    $ sudo yum install php-mbstring

    Loaded plugins: fastestmirror, security
    Loading mirror speeds from cached hostfile
     * base: mirror.net.cen.ct.gov
     * extras: centos.aol.com
     * updates: mirrors.seas.harvard.edu
    Setting up Install Process
    No package php-mbstring available.
    Error: Nothing to do

But no packages were found?

How to install PHP mbstring on CentOS 6.2

I have deployed Jenkins in my _CentOS_ machine, _Jenkins_ was working well for 3 days, but yesterday there was a `Disk space is too low. Only 1.019GB left.` problem. 

How can I solve this problem, it make my master offline for hours?

How to solve jenkins &#39;Disk space is too low&#39; issue?

CentOS 6.2 + GNU gdb (GDB) Red Hat Enterprise Linux (7.2-50.el6)

When I debug a simple c++ code with GDB, I saw the following warning:

    Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.47.el6_2.9.i686 libgcc-4.4.6-3.el6.i686 libstdc++-4.4.6-3.el6.i686

I have tried the following methods and none of them fix the problems:

 1. Search SO

 2. `yum install glibc`

 3. `debuginfo-install glibc-2.12-1.47.el6_2.9.i686 libgcc-4.4.6-3.el6.i686 libstdc++-4.4.6-3.el6.i686`

In fact, when I install those RPM one by one, I just realized that they are installed already.

    [root@localhost Excluded]# rpm -ivh glibc-2.12-1.47.el6_2.9.i686.rpm 
    Preparing...                ########################################### [100%]
    	package glibc-2.12-1.47.el6_2.9.i686 is already installed
    [root@localhost Excluded]# ls *.rpm
    glibc-2.12-1.47.el6_2.9.i686.rpm  libgcc-4.4.6-3.el6.i686.rpm
    [root@localhost Excluded]# rpm -ivh libgcc-4.4.6-3.el6.i686.rpm 
    Preparing...                ########################################### [100%]
    	package libgcc-4.4.6-3.el6.i686 is already installed
    [root@localhost Excluded]# rpm -ivh libstdc++-4.4.6-3.el6.i686.rpm 
    warning: libstdc++-4.4.6-3.el6.i686.rpm: Header V4 DSA/SHA1 Signature, key ID 192a7d7d: NOKEY
    Preparing...                ########################################### [100%]
    	package libstdc++-4.4.6-3.el6.i686 is already installed
    	file /usr/lib/libstdc++.so.6.0.13 from install of libstdc++-4.4.6-3.el6.i686 conflicts with file from package libstdc++-4.4.6-3.el6.i686

Why GDB cannot find it?

**Question**: Do I have to worry about this issue? If not, how to turn it off? If yes, how to fix it?

Thank you



Content Type	Original Author	Original Content on Stackoverflow
Question	AKKAweb	View Question on Stackoverflow
Solution 1 - Php	Nir Alfasi	View Answer on Stackoverflow
Solution 2 - Php	rdlowrey	View Answer on Stackoverflow
Solution 3 - Php	Francesco Casula	View Answer on Stackoverflow
Solution 4 - Php	Burak Keskin	View Answer on Stackoverflow
Solution 5 - Php	Ivan Fretes	View Answer on Stackoverflow
Solution 6 - Php	Adam Winter	View Answer on Stackoverflow

CentOS: Enabling GD Support in PHP Installation

Php Problem Overview

Php Solutions

Solution 1 - Php

Solution 2 - Php

Solution 3 - Php

Solution 4 - Php

Solution 5 - Php

Solution 6 - Php

How to make first letter uppercase in a UILabel?

The opposite of assert_select?

Attributions