implode

Function • Params and return types changed in PHP 8.0

Join array elements with a string.

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

implode Function synopsis

implode(array|string $separator, ?array $array = null): string

Parameters

$separator

Typearray|string

Optional. Defaults to an empty string.

$array

OptionalType?arrayDefault valuenull

The array of strings to implode.

Return value

Typestring

Returns a string containing a string representation of all the array elements in the same order, with the separator string between each element.

Changes to the implode Function

PHP 8.0

  • Return type added: string
  • Parameter name of parameter #1 changed: $glue to $separator
  • Parameter type added for parameter #1 ($separator): array|string
  • Parameter name of parameter #2 changed: $pieces to $array
  • Parameter type added for parameter #2 ($array): ?array
  • Parameter default value added for position #2 ($array): null
- implode($glue, $pieces)
+ implode(array|string $separator, ?array $array = null): string

implode 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