Converting a ereg_replace to preg_replace

[adrianTNT]

Can someone tell me how to convert this ereg_replace to preg_replace ?

 

$string = ereg_replace("[^A-Za-z0-9_]", " ", $string);

It is supposed to only allow letters and numbers.

 

Then I also need to replace multiple spaces that was like this:

$string = ereg_replace("( )+", "_", $string);

 

 

 

[gizmola]

The main difference is that the preg_ functions need a delimitter around your regex.  Otherwise, the internal regex (if it worked before)  will work fine with preg_ equivalents although you might need to read up on the parameters and return values.

[adrianTNT]

Thanks, so I tried this, and it seems to do the trick, (if anyone sees a problem please let me know):

 

$string = preg_replace("/[^A-Za-z0-9_]/", " ",$string);

 

 

[salathe]

... the internal regex (if it worked before)  will work fine with preg_ equivalents ...

 

... will usually work fine...

 

For reference to some differences, see http://php.net/reference.pcre.pattern.posix