International PHP Conference Berlin 2025

mb_strstr

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

mb_strstrFinds first occurrence of a string within another

Beschreibung

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

mb_strstr() finds the first occurrence of needle in haystack and returns the portion of haystack. If needle is not found, it returns false.

Parameter-Liste

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.

Rückgabewerte

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

Changelog

Version Beschreibung
8.0.0 needle akzeptiert nun eine leere Zeichenkette.
8.0.0 encoding ist nun nullable (akzeptiert den null-Wert).

Siehe auch

  • stristr() - Wie strstr, aber unabhängig von Groß- bzw. Kleinschreibung
  • strstr() - Findet das erste Vorkommen eines Strings
  • mb_stristr() - Finds first occurrence of a string within another, case insensitive

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