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mb_strstr

Description

The mb_strstr of Multibyte String for PHP finds first occurrence of a string within another.

Syntax

mb_strstr(
    string $haystack,
    string $needle,
    bool $before_needle = false,
    ?string $encoding = null
): string|false

Parameters

haystack

The string from which to get the first occurrence of needle

needle

The string to find in haystack

before_needle

Determines which portion of haystack this function returns. If set to true, it returns all of haystack from the beginning to the first occurrence of needle (excluding needle). If set to false, it returns all of haystack from the first occurrence of needle to the end (including needle).

encoding

Character encoding name to use. If it is omitted, internal character encoding is used.

Return

Returns the portion of haystack, or false if needle is not found.

Examples

1 · haystack needle

<?

$haystack = 'string🐘string🐘string';
$needle = '🐘string';

$return = mb_strstr($haystack, $needle);

echo $return;

🐘string🐘string

2 · before_needle

<?

$haystack = 'string🐘string🐘string';
$needle = '🐘string';
$before_needle = true;

$return = mb_strstr($haystack, $needle, $before_needle);

echo $return;

string

3 · encoding

<?

$haystack = 'string🐘string🐘string';
$needle = '🐘string';
$before_needle = true;
$encoding = 'UTF-8';

$return = mb_strstr($haystack, $needle, $before_needle, $encoding);

echo $return;

string