How to convert string to array in php

Conversion method: 1. Use the explode() function to split a string into several substrings according to the delimiter, and then combine these substrings into an array and return it. The syntax "explode(delimiter, String)"; 2. Use str_split() function, syntax "str_split(string)".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php converts string to array (Array) Method 1: Use the explode() function

explode() function can split a string based on the string delimiter, that is, it splits a string into several sub-strings based on the delimiter. string, then combine these substrings into an array and return it. The syntax format is as follows:

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

The parameter description is as follows:

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

Example:

<?php
header("Content-type:text/html;charset=utf-8");
$str = "PHP中文网,https://www.php.cn/";
$arr = explode(&#39;,&#39;, $str);
var_dump($arr);
$arr = explode(&#39;,&#39;, $str, 1);
var_dump($arr);
?>

Output result:

php will Method 2 to convert a string into an array (array): Use the str_split() function

str_split() function to split the string into an array.

Syntax

str_split(string,length)

The parameter description is as follows:

• string Required. Specifies the string to be split.

• #length Optional. Specifies the length of each array element. The default is 1.

Example:

<?php
header("Content-type:text/html;charset=utf-8");
$str = "Hello";
$arr = str_split($str);
var_dump($arr);
$arr = str_split($str,2);
var_dump($arr);
?>

Output result:

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