PHP Manual: Join array elements with a string

Description

string implode(string $separator, array $array)

Alternative signature (not supported with named arguments):

string implode(array $array)

Legacy signature (deprecated as of PHP 7.4.0, removed as of PHP 8.0.0):

string implode(array $array, string $separator)

Join array elements with a separator string.

Parameters

separator: Optional. Defaults to an empty string.
array: The array of strings to implode.

Return Values

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

Changelog

Version	Description
8.0.0	Passing the `separator` after the `array` is no longer supported.
7.4.0	Passing the `separator` after the `array` (i.e. using the legacy signature) has been deprecated.

Examples

Example #1 implode example

<?php

$array = ['lastname', 'email', 'phone'];
var_dump(implode(",", $array)); // string(20) "lastname,email,phone"

// Empty string when using an empty array:
var_dump(implode('hello', [])); // string(0) ""

// The separator is optional:
var_dump(implode(['a', 'b', 'c'])); // string(3) "abc"

?>

Notes

Note: This function is binary-safe.

implode