Usage analysis of substr () and explode () functions in PHP

This article mainly introduces the usage analysis of substr () and explode () functions in PHP, and describes in detail how substr () and explode () functions process strings in the form of instances, it is a function that is frequently used in string operations and has some practical value. For more information about how to use substr () and explode () functions in PHP, see the example in this article. Share it with you for your reference. The specific method is as follows:

Substr (string, start, length): This function extracts the length of the string starting from the start character. if start is negative, it is counted from the end of the string, if the parameter length can be omitted but is negative, it indicates that the last length is obtained. the instance code is as follows:

The code is as follows:

<? Php
Echo substr ("abcdef", 1, 3); // return "bcd"
Echo substr ("abcdef",-2); // return "ef"
Echo substr ("abcdef",-3, 1); // return "d"
Echo substr ("abcdef", 1,-1); // return "bcde"
?>

Explode (separator, string, limit, the instance code is as follows:

The code is as follows:

<? Php
$ Str = "abc | bck | fhq | nui ";
Print (explode ("|", $ srt); // output array ([0] => abc, [1] => bck, [2] => fhq, [3] => nui)
?>

I hope this article will help you with PHP programming.