PHP mb_ereg_search_setpos() Function

The mb_ereg_search_setpos() function is an inbuilt function in PHP that is used for setting the starting point for the next regular expression that will be matched.

Syntax:

mb_ereg_search_setpos(int $offset): bool

Parameter: This function accepts one parameter that is described below.

• $offset: This parameter is integer type if this parameter value is positive, it will start from the beginning, or if the negative value it will start from the end of the string. 

Return Values: This function returns “true” if the function successfully executes otherwise it will return “false”.

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

PHP

<?php

$pos = 5;
mb_ereg_search_setpos($pos);
$str = "Her Number is 993459";
mb_ereg_search_init($str);

if (mb_ereg_search("test")) {
    echo "Match found!";
} else {
    echo "Match not found.";
}

?>

PHP

<?php

$pos = 5;
mb_ereg_search_setpos($pos);
$str = "Her Number is 993459";
mb_ereg_search_init($str);

if (mb_ereg_search("test")) {
    echo "Match found!";
} else {
    echo "Match not found.";
}

?>

Output:

Match not found! 

Example 2:  The following program demonstrates  mb_ereg_search_setpos()  function

PHP

<?php
$pos = 2;
mb_ereg_search_setpos($pos);
$str = "This is a 9334 Number.";
mb_ereg_search_init($str);
echo mb_ereg_search("Number")
?>

Output:

1

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