Summary of php explode() function definition and usage (2021)
- PHP中文网Original
- 2018-05-02 10:51:496205browse
explode
Function: Use one string to split another string
Syntax:
explode ( string $delimiter , string $string [, int $limit ] ) : array
Parameters:
| delimiter | The delimiter character on the boundary. |
| string | The input string. |
| limit |
If the limit parameter is set and is a positive number, the returned array contains at most limit elements, and the last element will contain the remainder of the string part. If the limit parameter is a negative number, all elements except the last -limit elements are returned. If limit is 0, it will be treated as 1. |
返回值：
此函数返回由字符串组成的 array，每个元素都是 string 的一个子串，它们被字符串 delimiter 作为边界点分割出来。
如果 delimiter 为空字符串（""），explode() 将返回 FALSE。 如果 delimiter 所包含的值在 string 中找不到，并且使用了负数的 limit ， 那么会返回空的 array， 否则返回包含 string 单个元素的数组。
explode 示例
<?php
// 示例 1
$pizza = "piece1 piece2 piece3 piece4 piece5 piece6";
$pieces = explode(" ", $pizza);
echo $pieces[0]; // piece1
echo $pieces[1]; // piece2
// 示例 2
$data = "foo:*:1023:1000::/home/foo:/bin/sh";
list($user, $pass, $uid, $gid, $gecos, $home, $shell) = explode(":", $data);
echo $user; // foo
echo $pass; // *
?>返回示例
<?php /* A string that doesn't contain the delimiter will simply return a one-length array of the original string. */ $input1 = "hello"; $input2 = "hello,there"; var_dump( explode( ',', $input1 ) ); var_dump( explode( ',', $input2 ) ); ?>
打印结果
array(1)
(
[0] => string(5) "hello"
)
array(2)
(
[0] => string(5) "hello"
[1] => string(5) "there"
)limit 示例
<?php $str = 'one|two|three|four'; // 正数的 limit print_r(explode('|', $str, 2)); // 负数的 limit（自 PHP 5.1 起） print_r(explode('|', $str, -1)); ?>
打印结果
Array
(
[0] => one
[1] => two|three|four
)
Array
(
[0] => one
[1] => two
[2] => three
)explode 问题
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