Word filter

Hi,

I need a Filtering words before inserting into db

	$select=mysql_query("SELECT * FROM sh WHERE tags='$displaysearch' LIMIT 1") or die(mysql_error()); 

    if( mysql_num_rows($select) ){ 
    mysql_query("UPDATE sh SET count=count+1 WHERE tags='$displaysearch'") or die(mysql_error()); 
    }else{ 
    mysql_query("INSERT INTO sh SET tags='$displaysearch'") or die(mysql_error()); 
	
} 

Code (markup):

Using something like this:
When I write the word "sex" is replaced by ","

$placeholders = array('http', '//', ':', 'sex');
$replacement = array('', '', '', '');

Code (markup):

The problem is I don´t know how to resolve this.

Could you can help me?

Thank you very much.

 

$placeholders = array('http', '//', ':', 'sex');
$replacement = ''; // you don't have to pass an array with empty strings
$censored = str_replace($placeholders, $replacement, $displaysearch);

PHP:

The code above will replace all strings from $placeholders with $replacement value(empy string in this case).