Differences between explode and split functions in php

Source: Internet
Author: User

At one level, the explode and split functions in php are used to split characters into arrays. However, there are still differences between explode and split, next I will introduce it to you.

First, let's take a look at the definitions of the two methods:

Function prototype: array split (string $ pattern, string $ string [, int $ limit])

Function prototype: array explode (string $ separator, string $ string [, int $ limit])

There is no difference at first glance, and it seems that all functions are the same. I made this mistake. Note that the first parameters of the two functions are string $ pattern and string separator. $ pattern indicates a regular string, and $ separator indicates a normal string. See the following code:

The Code is as follows: Copy code

$ Test = end (explode ('.', 'abc.txt '));

Echo $ test; // output txt

Replace:

$ Test1 = end(split('.', 'abc.txt '));

Echo $ test1; // no output

The correct method to use split is to add escape characters.

$ Test1 = end(split('.', 'abc.txt '));

Echo $ test1; // output txt

 
Analysis: The "." symbol is the keyword of the regular expression, so split is invalid, while explode is valid.


Parsing dates that may be separated by diagonal lines, points, or horizontal lines:

Example 2. split () Example

<? Php
// The delimiter can be a diagonal line, a dot, or a horizontal line.
$ Date = "04/30/1973 ";
List ($ month, $ day, $ year) = split ('[/.-]', $ date );
Echo "Month: $ month; Day: $ day; Year: $ year <br/> n ";
?>


For examples of the behavior similar to @ chars = split ('', $ str) in Perl, see the example in the preg_split () function.

Note that pattern is a regular expression. If you want to use a delimiter that is a special character in a regular expression, you must first escape it. If the split () (or any other regex function) behavior is odd, read the regex.7 file contained in the regex/subdirectory of the PHP release package. This file is in the manual page format

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.