What does php explode mean?

In PHP, explode means "string to array", which is used to split a string into several substrings according to the delimiter, and then combine these substrings into an array and return it, the syntax is " explode(separating character, string, number of elements)"; the third parameter of this function can be omitted and is used to specify the number of array elements to be returned.

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

In php, explode means "character String to array".

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

explode($separator,$string,$limit)

The parameter description is as follows:

• $separator: the separator character used to split the string;
• $string: the character that needs to be split String;

• $limit: optional parameter, can be empty, specifies the number of array elements to be returned;

  Possible values:

  • is greater than 0, the returned array contains at most $limit elements, and the last element contains the remainder of $string;
  • is less than 0, then all elements except the last $limit elements are returned; ## If
  # is 0, it will be treated as 1; if
  • is empty (omitted), it means returning all array elements.

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);
$str = &#39;one,two,three,four&#39;;
$arr = explode(&#39;,&#39;, $str);
var_dump($arr);
$arr = explode(&#39;,&#39;, $str, 3);
var_dump($arr);
$arr = explode(&#39;,&#39;, $str, -2);
var_dump($arr);
$arr = explode(&#39;,&#39;, $str, 0);
var_dump($arr);
?>

If $separator is an empty string

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

Example:

<?php
$str = &#39;one,two,three,four&#39;;
$arr = explode(&#39;&#39;, $str);
var_dump($arr);
$arr = explode(&#39;@&#39;, $str, -1);
var_dump($arr);
?>

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