Open a phpinfo() and search for the line *Thread safety*. For a thread-safe build you should find *enable*.

As specified in the comments by [Muhammad Gelbana][1] you can also use:

 - On Windows : `php -i|findstr &quot;Thread&quot;`
 - On *nix: `php -i|grep Thread`

  [1]: https://stackoverflow.com/users/897041/muhammad-gelbana



If you prefer to use the command line:

&lt;!-- language-all: lang-none --&gt;

* *nix:

        php -i | grep -i &quot;Thread&quot;

* Windows:

        php -i | findstr -i &quot;thread&quot;

This should give you something like this:

    Thread Safety =&gt; enabled

or

    Thread Safety =&gt; disabled

I just find it easier to look at the file named php[version].dll in the root folder of php. Its either php[version].dll or php[version]ts.dll (ts standing for Thread Safe). So, if you have php7.0.10 installed, go to the directory that has this name and you&#39;ll find a file named php7ts.dll. This is a very sad way of finding out, but it works!

Then there&#39;s the undocumented `ZEND_THREAD_SAFE` constant, which seems to exist since PHP 4.3.

    &lt;?php

    if (ZEND_THREAD_SAFE) {
        echo &#39;Thread safe&#39;;
    } else {
        echo &#39;Not thread safe&#39;;
    }


https://3v4l.org/tALKX

Create a new PHP file and insert this code in it:

    &lt;?php
    phpinfo(); ?&gt;

Then run this page and you will find all of the PHP information. Search for the term that you want, and it will show you it&#39;s enabled.


Check if your install is Apache Module or CGI Binary. See Stack Overflow question *https://stackoverflow.com/questions/1623914*.


Another way to check it is using `php -v` or `php --version`. Example bellow from mine (NTS):

        $ php --version
        
        PHP 7.3.25-1+ubuntu20.04.1+deb.sury.org+1 (cli) (built: Dec 26 2020 10:32:51) ( NTS )       
        Copyright (c) 1997-2018 The PHP Group
        Zend Engine v3.3.25, Copyright (c) 1998-2018 Zend Technologies
        with Zend OPcache v7.3.25-1+ubuntu20.04.1+deb.sury.org+1, Copyright (c) 1999-2018, by Zend Technologies

As a learning experience, I want to make an iPhone application that calls a webserver/webservice, retrieves a JSON response, and uses that response to populate the rows of a `UITableView` (assuming it converts the JSON into an `NSArray` first).

Anyone know of anything that might be useful?

iPhone/iOS JSON parsing tutorial

&gt;https://stackoverflow.com/questions/5554725/which-value-is-better-to-use-boolean-true-or-integer-1

The above topic made me do some experiments with `bool` and `int` in `if` condition. So just out of curiosity I wrote this program:

    int f(int i) 
    {
    	if ( i ) return 99;   //if(int)
    	else  return -99;
    }
    int g(bool b)
    {
    	if ( b ) return 99;   //if(bool)
    	else  return -99;
    }
    int main(){}

`g++ intbool.cpp -S` generates asm code for each functions as follows:

 - asm code for `f(int)`

        __Z1fi:
           LFB0:
     	         pushl	%ebp
           LCFI0:
    	          movl	%esp, %ebp
           LCFI1:
    	          cmpl	$0, 8(%ebp)
    	          je	L2
    	          movl	$99, %eax
    	          jmp	L3
           L2:
    	          movl	$-99, %eax
           L3:
    	          leave
           LCFI2:
    	          ret


 - asm code for `g(bool)`

        __Z1gb:
           LFB1:
    	          pushl	%ebp
           LCFI3:
    	          movl	%esp, %ebp
           LCFI4:
    	          subl	$4, %esp
           LCFI5:
    	          movl	8(%ebp), %eax
    	          movb	%al, -4(%ebp)
    	          cmpb	$0, -4(%ebp)
    	          je	L5
    	          movl	$99, %eax
    	          jmp	L6
           L5:
    	          movl	$-99, %eax
           L6:
    	          leave
           LCFI6:
    	          ret


Surprisingly, `g(bool)` generates more `asm` instructions! Does it mean that `if(bool)` is little slower than `if(int)`? I used to think `bool` is especially designed to be used in conditional statement such as `if`, so I was expecting `g(bool)` to generate less asm instructions, thereby making `g(bool)` more efficient and fast. 

EDIT:

I&#39;m not using any optimization flag as of now. But even absence of it, why does it generate more asm for `g(bool)` is a question for which I&#39;m looking for a reasonable answer. I should also tell you that `-O2` optimization flag generates exactly same asm. But that isn&#39;t the question. The question is what I&#39;ve asked.

---



Which is faster : if (bool) or if(int)?

How do I find out whether the installed version of PHP is threadsafe or not thread safe?

Please note that I&#39;m not asking the difference between a threadsafe/non thread safe installation. I would like to find out what is installed currently.


Find if the installed PHP is threadsafe or nonthreadsafe?

<p>How do I find out whether the installed version of PHP is threadsafe or not thread safe?</p>
<p>Please note that I'm not asking the difference between a threadsafe/non thread safe installation. I would like to find out what is installed currently.</p>


How can I identify the server IP address in PHP?

How to identify server IP address in PHP

I want to add GET parameters to URLs that may and may not contain GET parameters without repeating `?` or `&amp;`.

Example:

If I want to add `category=action`

    $url=&quot;http://www.acme.com&quot;;
     // will add ?category=action at the end

    $url=&quot;http://www.acme.com/movies?sort=popular&quot;;
     // will add &amp;category=action at the end

If you notice I&#39;m trying to not repeat the question mark if it&#39;s found.

The URL is just a string.

What is a reliable way to append a specific GET parameter?

Manipulate a url string by adding GET parameters

I have php script that must be runned from console (php-cli). But configuration of php.ini for php-cli was incorrect. I fix it, but when I run script a had error with php config, because php.ini uses an old. 

How I can reload php.ini for console without restart server?

php.ini reload in php-cli

I noticed a lot of developers are using both strstr and strpos to check for a substring existence. Is one of them preferred and why ?

Which method is preferred strstr or strpos?

How do I make a self-posting/self-submitting form, i.e. a form that submits the results to itself, instead of submitting to another form?


How do I make a PHP form that submits to self?

When I try to open my Visual Studio project I get the following error:

&gt;Asp.Net has not been registered on the webserver you need to manually configure your webserver for Asp.net 4.0.


---
**Update:**  
Nevermind I fixed it:
  
I just repaired .Net Framework 4.0 and the issue was resolved.

Asp.net 4.0 has not been registered

I would like to know how to setup SSL on my web application on the localhost. 

I have no background in doing this, would appreaciate guidance. I already finished implementing my web application and i need it to use https on the localhost or while I host it on a server. 

Any Ideas? 


Regards. 

How do you use https / SSL on localhost?

I use `WebClient` type to upload *.cab files to my server. On the server side, I registered a HTTP handler for *.cab file with the PUT method as below:

&lt;!-- language: lang-xml --&gt;


     &lt;add name=&quot;ResultHandler&quot; path=&quot;*.cab&quot; verb=&quot;PUT&quot; type=&quot;FileUploadApplication.ResultHandler&quot; resourceType=&quot;Unspecified&quot; requireAccess=&quot;Script&quot; preCondition=&quot;integratedMode&quot; /&gt;

But I always get a &quot;405 method not allowed&quot; error. The response said the allowed methods are as below:

    Headers = {Allow: GET, HEAD, OPTIONS, TRACE
    Content-Length: 1293
    Content-Type: text/html
    Date: Fri, 27 May 2011 02:08:18 GMT
    Server: Microsoft-IIS/7.5
    X-Powered-By: ASP.NET}

Even if I explicitly allow the PUT method in the IIS Request Filtering for my web application, the same error still occurs.

I suspect this is a IIS related issue. I&#39;m hoping someone could shed some light on this for me.

&quot;405 method not allowed&quot; in IIS7.5 for &quot;PUT&quot; method

I need .pfx file to install https on website on IIS. 

I have two separate files: certificate (.cer or pem) and private key (.crt) but IIS accepts only .pfx files.


I obviously installed certificate and it is available in certificate manager (mmc) but when I select Certificate Export Wizard I cannot select PFX format (it&#39;s greyed out)

Are there any tools to do that or C# examples of doing that programtically?

How to create .pfx file from certificate and private key?

I&#39;m trying to set up an application from a third party, which requires a supporting website hosted in my local IIS. I&#39;ve created a website exactly as explained in their install guide, but am having some problems, and would like to see what the IIS log has to say. Embarrassingly enough, the problem is I can&#39;t find the log files!

So my question is: Where does IIS7 store logs by default?

IIS: Where can I find the IIS logs?

Is it valid to share one instance of the `Random` class between multiple threads? And to call `nextInt(int)` from multiple threads in particular?

Is Random class thread safe?

I want an implementation of `List&lt;T&gt;` as a property which can be used thread-safely without any doubt.

Something like this:

    private List&lt;T&gt; _list;

    private List&lt;T&gt; MyT
    {
        get { // return a copy of _list; }
        set { _list = value; }
    }

It seems still I need to return a copy (cloned) of collection so if somewhere we are iterating the collection and at the same time the collection is set, then no exception is raised.

How to implement a thread-safe collection property?

Thread-safe List&lt;T&gt; property

Using Thread is pretty straightforward  

     Thread thread = new Thread(MethodWhichRequiresSTA);
     thread.SetApartmentState(ApartmentState.STA);  

How to accomplish the same using Tasks in a WPF application? Here is some code:  


    Task.Factory.StartNew
      (
        () =&gt; 
        {return &quot;some Text&quot;;}
      )
       .ContinueWith(r =&gt; AddControlsToGrid(r.Result));  

I&#39;m getting an InvalidOperationException with

&gt; The calling thread must be STA, because many UI components require this.

How to create a task (TPL) running a STA thread?

I see that for using objects which are not thread safe we wrap the code with a lock like this:

    private static readonly Object obj = new Object();
    
    lock (obj)
    {
        // thread unsafe code
    }

So, what happens when multiple threads access the same code (let&#39;s assume that it is running in a ASP.NET web application). Are they queued? If so how long will they wait? 

What is the performance impact because of using locks?

What does a lock statement do under the hood?

I was wondering if the `DbContext` class is thread safe, I am assuming it&#39;s not, as I am currently executing paralell threads that access the `DbContext` in my application and I am getting a host of locking exceptions and other things that look like they may be thread related.

Until recently I wasn&#39;t getting any errors...but until recently I wasn&#39;t accessing the `DbContext` in the threads.

If I am right, what would people suggest as a solution?

Content Type	Original Author	Original Content on Stackoverflow
Question	Josh	View Question on Stackoverflow
Solution 1 - Php	grunk	View Answer on Stackoverflow
Solution 2 - Php	Matt	View Answer on Stackoverflow
Solution 3 - Php	Flemin Adambukulam	View Answer on Stackoverflow
Solution 4 - Php	ShiraNai7	View Answer on Stackoverflow
Solution 5 - Php	peroxide	View Answer on Stackoverflow
Solution 6 - Php	Phliplip	View Answer on Stackoverflow
Solution 7 - Php	Julyano Felipe	View Answer on Stackoverflow

Find if the installed PHP is threadsafe or nonthreadsafe?

Php Problem Overview

Php Solutions

Solution 1 - Php

Solution 2 - Php

Solution 3 - Php

Solution 4 - Php

Solution 5 - Php

Solution 6 - Php

Solution 7 - Php

Which is faster : if (bool) or if(int)?

iPhone/iOS JSON parsing tutorial

Attributions