Strtr functions in PHP

Source: Internet
Author: User

Introduction: This is a detailed page of strtr functions in PHP. It introduces the related knowledge, skills, experience, and some PHP source code.

Class = 'pingjiaf' frameborder = '0' src = 'HTTP: // biancheng.dnbc?info/pingjia.php? Id = 359983 'rolling = 'no'>

The strtr function of PHP has a higher performance than the str_replace function. It can be used instead of str_replace.

Strtr has two forms:

String Strtr (String $ Str , String $ From , String $ ) String Strtr (String $ Str , Array $ Replace_pairs )

When the first type is used, the string length of $ from and $ to must be the same; otherwiseExtra (whether $ from or $ to) characters are ignored.

For example, $ STR = 'a-= B ';

When $ from = '-=', $ to = 'cd', output 'acdb' because '-=' is of the same length as 'cd', no problem.

When $ from = '-=', $ to = 'cde', the output 'acdb' is ignored.

When $ from = '-=', $ to = 'C', output 'ac = B ',' = 'in $ from is ignored.

In the second form, there is no such problem, and redundant notes will not be ignored.

Therefore, if the strtr function is intentionally used to replace str_replace and the first form is used, pay attention to this feature,This may be a trap..

Love J2EE follow Java Michael Jackson video station JSON online tools

Http://biancheng.dnbcw.info/php/359983.html pageno: 1.

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.