PHP preg_replace() Function

PHP preg_replace() Function


Hello folks! welcome back to a new section of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP preg_replace() function.

PHP preg_replace() function works like the PHP POSIX ereg_replace() function, except that regular expressions can be used in the pattern and replacement input parameters.

The optional input parameter limit is used for specifying how many matches should take place.

If the optional parameter $count is passed, then this variable is going to be filled with the number of replacements done.


Syntax

The following below is the syntax for the preg_replace() function -

mixed preg_replace (mixed pattern, mixed replacement, mixed string  [, int  limit  [,  int  & $count ]] );  

Return Value

  • After the replacement has occurred, the modified string will be returned.
  • If no matches are found, the string will not be changed.

Example

Following is a simple example -

<?php
   $copy_date = "Copyright 2017";
   $copy_date = preg_replace("([0-9]+)", "2020", $copy_date);
   
   print $copy_date;
?>

Output

When the above code is executed, it will produce the following result -

Copyright 2020


Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial guide, we are going to be discussing about the PHP preg_split() Function.

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