mb_stristr

Function • Params and return types changed in PHP 8.0

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

PHP 5
PHP 7
PHP 8.0
Improved
PHP 8.1
PHP 8.2-8.3
PHP 8.4
PHP 8.5
PHP 8.6

mb_stristr Function synopsis

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

Parameters

$haystack

Typestring

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

$needle

Typestring

The string to find in $haystack

$before_needle

OptionalTypeboolDefault valuefalse

$encoding

OptionalType?stringDefault valuenull

Return value

Typestring|false

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

Changes to the mb_stristr Function

PHP 8.0

  • Return type added: string|false
  • Parameter type added for parameter #1 ($haystack): string
  • Parameter type added for parameter #2 ($needle): string
  • Parameter name of parameter #3 changed: $part to $before_needle
  • Parameter type added for parameter #3 ($before_needle): bool
  • Parameter default value added for position #3 ($before_needle): false
  • Parameter type added for parameter #4 ($encoding): ?string
  • Parameter default value added for position #4 ($encoding): null
  mb_stristr(
-     $haystack,
+     string $haystack,
-     $needle,
+     string $needle,
-     $part,
+     bool $before_needle = false,
-     $encoding
+     ?string $encoding = null
-   )
+   ): string|false

mb_stristr Function Availability

PHP VersionAvailability
PHP 8.6Upcoming Release Yes
PHP 8.5Supported (Latest) Yes
PHP 8.4Supported Yes
PHP 8.3Security-Fixes Only Yes
PHP 8.2Security-Fixes Only Yes
PHP 8.1Unsupported Yes
PHP 8.0Unsupported Yes
PHP 7.4Unsupported Yes
PHP 7.3Unsupported Yes
PHP 7.2Unsupported Yes
PHP 7.1Unsupported Yes
PHP 7.0Unsupported Yes
PHP 5.6Unsupported Yes
PHP 5.5Unsupported Yes
PHP 5.4Unsupported Yes
PHP 5.3Unsupported Yes