PHP mb_strstr() – Find First Occurrence of a Substring
The article explains PHP’s mb_strstr() function, detailing its syntax, how it finds the first occurrence of a needle in a haystack, the optional before_needle and encoding parameters, and the return values including FALSE when the needle is absent.
string mb_strstr ( string $haystack, string $needle [, bool $before_needle = false [, string $encoding = mb_internal_encoding() ] ] )
mb_strstr() searches for the first occurrence of $needle in $haystack and returns a portion of the haystack. If the needle is not found, it returns FALSE.
Parameters
$haystack : The string to search in.
$needle : The substring to look for.
$before_needle (optional, bool, default FALSE): If TRUE, returns the part of $haystack before the needle (excluding the needle); if FALSE, returns the part from the needle to the end (including the needle).
$encoding (optional, string): The character encoding to use; defaults to the internal encoding.
Return value
Returns the portion of $haystack as described, or FALSE if the needle is not found.
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