problem with format preg_match

[kfir91]

else if( !preg_match("/([a-zA-Z0-9א-ת-])*[,]([a-zA-Z0-9א-ת-])+$/", $tags))

i wanted to doing

format :

 

word,word,word,word...etc

 

but its not working

i want

word comma word comma word its the format

and only one comma

not

word,,word,word,word

[.josh]

umm...what?

[icez]

[,]{1}

[sasa]

try

<?php
$test =  'sasa,,word7,bond007';
if(preg_match('/((^|[^a-z0-9]),)|(,([^a-z0-9]|$))/i', $test)) echo 'No'; else echo 'OK';
?>