What is php explode used to convert to an array?

In PHP, the explode() function is used to convert a string into an array. The explode() function can split a string based on the string separator, that is, split a string into several substrings based on the separator, and then combine these substrings into an array and return it; the syntax is "explode(separator, string , the number of array elements)".

The operating environment of this tutorial: windows7 system, PHP version 8.1, DELL G3 computer

In php, explode() Function is used to convert a string into an array.

explode() function uses one string to split another string and returns an array composed of strings.

In detail: The explode() function can split a string based on the string delimiter, that is, split a string into several substrings based on the delimiter, and then combine these substrings into an array and return it.

explode($delimiter, $string [, $limit])

The parameter description is as follows:

• $delimiter: the splitting character used to split the string;
• $string: the string that needs to be split;
• $limit: Optional parameter, which can be empty, specifies the number of array elements to be returned;
  • If $limit is not empty and is a positive number, the returned array contains at most $limit elements. The last element contains the remainder of $string;
  • If $limit is not empty and is negative, all elements except the last $limit elements are returned;
  • If $ If limit is 0, it will be treated as 1;
  • If $limit is empty, it means returning all array elements.

Note: The $delimiter parameter cannot be an empty string. Otherwise, an error will be reported.

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$str = &#39;hypertext language programming&#39;;
var_dump($str);
$arr=explode(" ",$str);
var_dump($arr);
$arr=explode("t",$str);
var_dump($arr);
$arr=explode("",$str);
var_dump($arr);
?>

$limit takes different values:

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$str = &#39;hypertext language programming&#39;;
var_dump($str);
$arr=explode(" ",$str);
var_dump($arr);
$arr=explode(" ",$str,2);
var_dump($arr);
$arr=explode(" ",$str,-1);
var_dump($arr);
?>

Recommended learning: "PHP Video Tutorial》

The above is the detailed content of What is php explode used to convert to an array?. For more information, please follow other related articles on the PHP Chinese website!