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PHP – mb_stristr() function
The mb_stristr() function in PHP is used to search the first existence of a string in another given string; this function is not case-sensitive. mb_stristr() searches for the first existence of the needle in a given haystack string and returns the portion of the haystack. It will return False if the needle is not found.
Syntax
string mb_stristr( $str_haystack, $str_needle, $bool_before_needle=false, $str_encoding=empty )
Parameters
mb_stristr() accepts the following four parameters −
$str_haystack − This parameter is used to get the first existence of the string needle.
$str_needle − This parameter is used to find the string in a haystack or from the given string.
$bool_before_needle − This parameter is used to decide which portion of the haystack to return.
If it is set to True, then it returns all the haystack string from the starting to the first existence of the needle "excluding the needle".
If it is set to False, then it returns all the haystack string from the first existence of the needle to the end "including the needle".
$str_encoding − This parameter returns the position of the haystack or it will return False, if not found.
Return Values
mb_stristr() returns the portion of the haystack string if the needle is found. It returns False if the needle is not found.
Example 1
<?php
//using string Hello World
// using false needle
$string=mb_stristr("Hello World","or", false);
// output
print_r($string);
?>Output
orld
Example 2
<?php
//using string Hello World
// using true needle
$string=mb_stristr("Hello World","or", true);
// output
print_r($string);
?>Output
Hello W
Note − mb_stristr() works just like strichr(), but the only difference is that mb_stristr() is case-insensitive.
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