PHP mb_strpos() Function

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The mb_strpos() function is an inbuilt function in PHP that finds the position of string occurrence in the string.

Syntax:

mb_strpos(  $haystack, $needle, $offset, $encoding ): int|false

Parameters: This function accepts 4 parameters that are described below:

$haystack: This parameter is the main string parameter where we check the string.
$needle: This parameter is searching string parameter in the main string.
$offset: This parameter is an optional parameter. It is used for defining where you are to start searching string in the $haystack parameter.
$encoding: This parameter is also optional. It is used for defining an encoding by using the mb_internal_encoding() function.

Return Values: This function returns return the integer of the first occurrence of $needle in the $haystack parameter. If $needle does not find in the $haystack parameter, it will return “false”.

Example 1: The following code demonstrates the mb_strpos() function.

PHP

<?php 
$string = "This is a test string"; 
$substring = "test"; 
  
$position = mb_strpos($string, $substring); 
  
// Output the position 
echo $position; 
?>

Output:

Example 2: The following code demonstrates the mb_strpos() function.

PHP

<?php 
$string = "zambiatek"; 
$substring = "test"; 
  
if (mb_strpos($string, $substring)) { 
    echo "Substring is found"; 
} else { 
    echo "Substring is not found"; 
} 
?>

Output:

Substring is not found

Reference: https://www.php.net/manual/en/function.mb-strpos.php

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