Interpretation of PHP function preg_replace () array replacement code example

PHP function preg_replace () prototype: mixed preg_replace (mixed $ pattern, mixed $ replacement, mixed $ subject [, int $ limit])

The PHP function preg_replace () is more powerful than c. Arrays can be used for the first three parameters. The fourth parameter $ limit can be used to set the number of replicas. By default, all replicas are replaced. Code 6.7 is an array replacement application instance.

PHP function preg_replace () code 6.7 array replacement

 

  
<? Php
  
// String
  
$ String = "Name: {Name} <br> nEmail:
{Email} <br> nAddress: {Address} <br> n ";
  
// Mode
  
$ Patterns = array (
  
"/{Address }/",
  
"/{Name }/",
  
"/{Email }/"
  
);
  
// Replace the string
  
$ Replacements = array (
  
"No. 5, Wilson St., New York, U. S. ",
  
"Thomas Ching ",
  
"Tom@emailaddress.com ",
  
);
  
// Output mode replacement result
  
Print preg_replace ($ patterns,
$ Replacements, $ string );
  
?>
 

The output result is as follows.

Name: Thomas Ching ",
Email: tom@emailaddress.com
Address: No. 5, Wilson St., New York, U. S.
You can use the pattern modifier "e" in the regular expression preg_replace ". The function is to use the matching result as an expression and perform a new operation. For example:

 

  
<? Php
  
$ Html_body =
  
"<HTML>
  
<Body>
  
<H1> TEST </H1>
  
My Picture 
  
</Body>
  
</HTML> ";
  
// The HTML tags in the output result are all lowercase letters.
  
Echo preg_replace (
  
"/(</?) (W +) ([^>] *>)/e ",
  
"'\ 1'. strtolower (' \ 2'). '\ 3'", // The mode variable here
\ 2 converts strtolower to lowercase characters
  
$ Html_body );
  
?>
 

The above is the detailed usage of the PHP function preg_replace (), and I hope to help you.