preg_replace : preg_replace « String « PHP






preg_replace

 
<?php
   $text = "This is a link to http://www.java2s.com/.";
   echo preg_replace("/http:\/\/(.*)\//", "<a href=\"\${0}\">\${0}</a>", $text);
?>
  
  








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1.$0 is set to the whole match, then $1, $2
2.Converting Line Breaks
3.preg_replace
4.preg_replace with index
5.Pass a fourth parameter to preg_replace( ) to specify the maximum number of replacements you want to make.
6.Pass arrays of regular expressions and replacement strings to preg_replace().
7.Replacing with preg_replace()
8.Using Back References with preg_replace()
9.Using preg_replace() to Replace Patterns
10.e modifier treats the replacement string in preg_replace() as if it were PHP.
11.pass arrays as parameter one and parameter two, and preg_replace() performs multiple replaces
12.Escape a > character in HTML
13.Replacing URLs with Links
14.Formatting a Phone Number
15.Entity encoding matched text
16.Escaping Special Characters
17.Regular Expression Replacements
18.Remove any doubled-up whitespace
19.Replace any non-space whitespace, with a space
20.Replace with regular expression
21.Replacing using backreferences
22.Quote escaping in backreference replacements