Detailed explanation of the explode() function in PHP

 

                                                                                                                                                                                    ##PHP provides us with the explode() function. This article will take you to take a look. First of all, the first thing that should be understood should be the syntax:

explode ( string $delimiter,string $string , int $limit = ?   )

$delimiter: The delimiter character on the boundary.
#$string: Input string.
$limit: If the value is a positive number, the returned array contains up to $limit elements, and the last element will contain the remainder of $string. If the value is negative, all but the last -$limit elements are returned. If $limit is 0, it will be treated as 1.
Return value: array type array, each element is a substring of $string.
Code example:

1. When using two parameters:

<?php
$sentence1 = "良人当归即好,人生当苦无妨,我有一剑,可搬山";
$sentence2 = explode(",", $sentence1);
print_r($sentence2);

输出：Array( [0] => 良人当归即好 [1] => 人生当苦无妨  [2] => 我有一剑  [3] => 可搬山)

2. When there are three parameters used:

<?php
$sentence1 = "良人当归即好,人生当苦无妨,我有一剑,可搬山";

//$limite为正整数
$sentence2 = explode(",", $sentence1,3);
print_r($sentence2);
echo "<br>";

//$limite为0
$sentence3 = explode(",", $sentence1,0);
print_r($sentence3);
echo "<br>";

//$limite为负整数
$sentence4 = explode(",", $sentence1,-2);
print_r($sentence4);

输出：
Array(   [0] => 良人当归即好      [1] => 人生当苦无妨   [2] => 我有一剑   [3] => 可搬山)
Array(   [0] => 良人当归即好,人生当苦无妨,我有一剑,可搬山)
Array(   [0] => 良人当归即好      [1] => 人生当苦无妨)

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