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# explode

(PHP 3, PHP 4 , PHP 5)

explode -- Split a string by string

## Description

array explode ( string separator, string string [, int limit] )

Returns an array of strings, each of which is a substring of string formed by splitting it on boundaries formed by the string separator. If limit is set, the returned array will contain a maximum of limit elements with the last element containing the rest of string.

If separator is an empty string (""), explode() will return `FALSE`. If separator contains a value that is not contained in string, then explode() will return an array containing string.

If the limit parameter is negative, all components except the last limit are returned. This feature was added in PHP 5.1.0.

Although implode() can, for historical reasons, accept its parameters in either order, explode() cannot. You must ensure that the separator argument comes before the string argument.

> 注: The limit parameter was added in PHP 4.0.1

範例 1. explode() examples

`<?php // Example 1 $pizza = "piece1 piece2 piece3 piece4 piece5 piece6"; $pieces = explode(" ", $pizza); echo $pieces[0]; // piece1 echo $pieces[1]; // piece2 // Example 2 $data = "foo:*:1023:1000::/home/foo:/bin/sh"; list($user, $pass, $uid, $gid, $gecos, $home, $shell) = explode(":", $data); echo $user; // foo echo $pass; // * ?>`

範例 2. limit parameter examples

`<?php $str = 'one|two|three|four'; // positive limit print_r(explode('|', $str, 2)); // negative limit print_r(explode('|', $str, -1)); ?>`

The above example will output:

    Array
    (
        [0] => one
        [1] => two|three|four
    )
    Array
    (
        [0] => one
        [1] => two
        [2] => three
    )

> 注: 這個函數可安全的使用於二進位。

See also preg_split(), spliti(), split(), and implode().

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