Analysis of explode function usage in php

This article mainly introduces the usage of the explode function in php. The example analyzes the application of the explode function to split strings and obtain file extensions, which has some reference value, for more information about how to use the explode function in php, see the example in this article. Share it with you for your reference. The details are as follows:

Explode (string separator, string [, int limit])

The separator is a null string (""), and explode () returns FALSE. if the value contained in the separator cannot be found in the string, explode () returns an array containing a single string element.

Explode instance 1 with the following code:

The code is as follows:

$ Explode = "aaa, bbb, ccc, ddd, explode, jjjj ";

$ Array = explode (',', $ explode );

Print_r ($ array );
/*
// The result is
Array
(
[0] => aaa
[1] => bbb
[2] => ccc
[3] => ddd
[4] => explode
[5] => JJJJJ
)
*/

We can use the explode function and end function when processing the date or getting the file extension. the following shows the instance code:

The code is as follows:

$ File = "www.jb51.net.gif ";

$ ExtArray = explode ('.', $ file );
$ Ext = end ($ extArray );
Echo $ ext;

// The output value is .gif.

Note: The Separator cannot be a null string, and the string to be split is null.

The Definition and Usage functions are not used. it may be because the delimiter you set does not exist.

I hope this article will help you with PHP programming.