Multibyte String Functions
PHP Manual

mb_stripos

Finds position of first occurrence of a string within another, case insensitive

Description

intfalse mb_stripos(
    string $haystack,
    string $needle,
    int $offset = 0,
    stringnull $encoding = null
)

mb_stripos returns the numeric position of the first occurrence of needle in the haystack string. Unlike mb_strpos, mb_stripos is case-insensitive. If needle is not found, it returns false.

Parameters

haystack

The string from which to get the position of the first occurrence of needle

needle

The string to find in haystack

offset

The position in haystack to start searching. A negative offset counts from the end of the string.

encoding

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

Return Values

Return the numeric position of the first occurrence of needle in the haystack string, or false if needle is not found.

Errors/Exceptions

  • If offset is greater than the length of haystack, a ValueError will be thrown.

Changelog

Version Description
8.0.0 needle now accepts an empty string.
8.0.0 encoding is nullable now.
7.1.0 Support for negative offsets has been added.

See Also

  • stripos
  • strpos
  • mb_strpos