How to convert string to array in php?

In PHP, you can use the built-in function explode() to convert a string into an array; this function can split a string into several substrings based on delimiters, and then combine these substrings into an array And return, the syntax format is "explode (delimiter, string, return the number of array elements)".

#During the development process, we often encounter situations where we need to convert a string into an array. PHP has a built-in explode() function that can split a string into several parts according to specific delimiters.

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

explode(separator,string,limit)

The parameter description is as follows:

• delimiter: the delimiter 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, and the last element contains the remaining part of string;

  • If limit is not If it is empty and negative, all elements except the last limit elements will be returned;

  • If limit is 0, it will be treated as 1;

  • If limit is empty, it means returning all array elements.

If delimiter is an empty string "", the program will prompt a Warning, and the explode() function will return FALSE; if delimiter The contained value is not found in string and a negative limit is used, an empty array is returned, otherwise an array containing a single element of string is returned.

Example:

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);
$str = &#39;PHP中文网,PHP教程,https://www.php.cn/,explode()函数,字符串转数组&#39;;
echo &#39;<pre class="brush:php;toolbar:false">&#39;;
$arr = explode(&#39;,&#39;, $str);
print_r($arr);
$arr = explode(&#39;,&#39;, $str, 3);
print_r($arr);
$arr = explode(&#39;,&#39;, $str, -2);
print_r($arr);
$arr = explode(&#39;,&#39;, $str, 0);
print_r($arr);
$arr = explode(&#39;&#39;, $str);
var_dump($arr);
$arr = explode(&#39;@&#39;, $str, -1);
print_r($arr);
?>

Output:

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