PHP mb_ereg() Function

The mb_ereg() function is an inbuilt function in PHP that is used for searching a string in the multibyte string by using the regular expression.

Syntax:

mb_ereg($pattern, $string, $matches ): bool

Parameters: The following function has three parameters that are described below.

• $pattern:  The regular expression pattern that we used for matching against the multibyte string.
• $string:  The string to search for a match.
• $matches:  This is the optional parameter that stored the match elements in the array.

Return Values: The mb_ereg() function returns either "true" or "false" depending on whether the regular expression pattern matches the string. If the optional $matches parameter is provided, any matched subpatterns will be stored in the array.

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

PHP

<?php
  
$subject = "12345This is String";

if(mb_ereg("^[A-Za-z\s]+$", $subject)) {
    echo "Match found!";
} else {
    echo "Match not found!";
}    

?>   

Output:

Match not found!  

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

PHP

<?php
  
mb_regex_encoding('UTF-8');
$pattern = '[0-9]+[a-zA-Z]+';
$string = '123abc';

if (mb_ereg($pattern, $string)) {
    echo 'Pattern matched successfully!';
} else {
    echo 'Pattern did not match.';
}    

?>

Output:

Pattern matched successfully!  

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

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