Replacing String In A File

[knashash]

I am trying to:

1. Open A File: file.html
2. Find This String In The File: <input type="text" name="cre">
3. Replace This String With: <input type="text" name="cre2">
4. And Resave The File With The Replaced String.

Can someone please tell me how to do this....im sorry im very new to PHP.

Thank You......

[HalfaBee]

Try this

$s = file_get_contents( 'file.html' );
$s = preg_replace( '/"cre"/','"cre2"',$s );
if( $fp = fopen( 'file.html','w' ) )
{
    fwrite( $fp , $s );
    fclose( $fp );
}
else
    echo 'Could not write to file ';

HalfaBee