str_replace

I want to find and replace some words. the problem is i do not want to replace the words if they are in a word.

forexample this is the sentence:

I want to change.

PHP:

the output should be:

I want change.

PHP:

as you see "an" did not changed in the word "change"
because "an" is not by it self.

$short = array('of', 'to', 'in', 'an');
$title = str_replace($short, "", $title);

PHP:

How can i do this?

Thanks

 

Use preg_replace instead of str_replace so that you can utilize the word-boundry character.

$short = array('of', 'to', 'in', 'an');
$pattern = '#\b' . implode('\b|\b', $short) . '\b#i';
$title = preg_replace($pattern, '', $title);

Code (markup):

 

<?php
$subject='I want an anaconda';
$search=' an ';//observe the leading and traliing whitespaces around 'an'
$replace=' ';//replace it with a white-space
$subject=str_replace($search,$replace,$subject);
echo $subject;//I want anaconda
//you may have a $search array to look for other possible situations where you may have that word.
?>

PHP:

 

Which completely falls apart with

Seriously, don't fumble around with str_replace, let the computer do the work for you and use preg_replace.

 

^^
That is why you must read the solution completely and understand it. You missed the comment that read

And if case is a issue. use case-insensitive replacements, str_ireplace() !