PHP string strchr() Function

Last Updated : 17 Mar 2025

The string strchr() function is predefined function of PHP. It is the alias of strstr() function or can used to search for the first occurrence of a given string.

Note: This function is case sensitive and binary-safe.

Syntax:

Parameter	Description	Required/Optional
String	Specify the string to search.	Required
Search	Specify the string to search. If parameter is number then return ASCII value.	required
before_search	It is false when default value is boolean. If it is true then returns the pars of the string before the first occurrence of the search parameter	Optional

Example 1

<?php
//It will return the first occurrence of "PHP" inside "Hello PHP" and return the rest of the string:
$str1="Hello PHP";
$str2="PHP";
echo strchr($str1,$str2);
?>

Output:

PHP

Example 2

<?php
 //It will  Search a string for the ASCII value of "P" and return the rest of the string:
$str="Hello PHP";
echo strchr("PHP Javatpoint!",112);
?>

Output:

point!

Example 3

<?php
 //It will return the part of the string before the first occurence of "PHP":
$str1="Hello PHP";
$str2="PHP";
echo strchr($str1,$str2,true);
?>

Output:

Hello

References:

http://php.net/manual/en/function.strchr.php

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