PHP string "contains"

PhpRegexString

Php Problem Overview

What would be the most efficient way to check whether a string contains a "." or not?

I know you can do this in many different ways like with regular expressions or loop through the string to see if it contains a dot (".").

Php Solutions

Solution 1 - Php

PHP 8 or newer:

Use the str_contains function.

if (str_contains($str, "."))
{
    echo 'Found it';
}

else
{
    echo 'Not found.';
}

PHP 7 or older:

if (strpos($str, '.') !== FALSE)
{
    echo 'Found it';
}

else
{
    echo 'Not found.';
}

Note that you need to use the !== operator. If you use != or <> and the '.' is found at position 0, the comparison will evaluate to true because 0 is loosely equal to false.

Solution 2 - Php

You can use these string functions,

strstr — Find the first occurrence of a string

stristr — Case-insensitive strstr()

strrchr — Find the last occurrence of a character in a string

strpos — Find the position of the first occurrence of a substring in a string

strpbrk — Search a string for any of a set of characters

If that doesn't help then you should use preg regular expression

preg_match — Perform a regular expression match

Solution 3 - Php

You can use stristr() or strpos(). Both return false if nothing is found.

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Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionealeonView Question on Stackoverflow
Solution 1 - PhpakatakritosView Answer on Stackoverflow
Solution 2 - PhpMuthu KumaranView Answer on Stackoverflow
Solution 3 - PhpSylverdragView Answer on Stackoverflow