PHP RegEx: Match A String

Submitted by: 
Language: 
Visitors have accessed this post 634 times.

In this tutorial I will show you the basic in regex.

In brief discussion.

Regex is considered a method of matching pattern within a string. In PHP usually used PCRE or "Perl Compatible Regular Expressions".

Let's see a sample to print a string.

  1. <?php
  2.  
  3. // create a string
  4. $string = 'abcdefghijklmnopqrstuvwxyz0123456789';
  5. // echo our string
  6. echo $string;
  7.  
  8. ?>

The above code are printing "abcdefghijklmnopqrstuvwxyz0123456789". Now were going to match the character "xyz" using regex.

  1. <?php
  2.  
  3. // create a string
  4. $string = 'abcdefghijklmnopqrstuvwxyz0123456789';
  5. echo preg_match("/xyz/", $string);
  6.  
  7. ?>

The code above will output "1" because the character "xyz" are matches to the string given. Then the preg_match will output zero "0" if it could not matches to the string given.


Note: Due to the size or complexity of this submission, the author has submitted it as a .zip file to shorten your download time. After downloading it, you will need a program like Winzip to decompress it.

Virus note: All files are scanned once-a-day by SourceCodester.com for viruses, but new viruses come out every day, so no prevention program can catch 100% of them.

FOR YOUR OWN SAFETY, PLEASE:

1. Re-scan downloaded files using your personal virus checker before using it.
2. NEVER, EVER run compiled files (.exe's, .ocx's, .dll's etc.)--only run source code.

Add new comment

Filtered HTML

  • Web page addresses and e-mail addresses turn into links automatically.
  • You may insert videos with [video:URL]
  • Allowed HTML tags: <a> <em> <strong> <cite> <blockquote> <code> <ul> <ol> <li> <dl> <dt> <dd> <table> <tr> <td> <th> <img> <h1> <h2> <h3> <iframe> [video]
  • You can enable syntax highlighting of source code with the following tags: <code>, <blockcode>, <asp>, <c>, <cpp>, <csharp>, <css>, <html4strict>, <java>, <javascript>, <mysql>, <php>, <python>, <sql>, <vb>, <vbnet>. The supported tag styles are: <foo>, [foo].
  • Lines and paragraphs break automatically.

Plain text

  • No HTML tags allowed.
  • Lines and paragraphs break automatically.
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.