regex currency

[poe]

how do i validate valid currency from a form

 

the form can either be like:

 

24.75 (no dollar sign, dollars & cents)

$24.75 (with a dollar sign)

$24 (with dollar sign, no cents)

24 (no dollar sign, no cents)

 

thanks

chris

[nrg_alpha]

$entry = '24.75, $24.756, $24, 24, $24.75, $25f, $25.67';
$str = explode(',' , $entry);
foreach($str as $val){
   if(preg_match('#^\$?\d+(\.\d{2})?$#', trim($val), $matches)){
      echo $val . '= valid <br />';
   } else {
      echo $val . '= invalid <br />';
   }
}

 

ouputs:

 

24.75= valid 
$24.756= invalid 
$24= valid 
24= valid 
$24.7= invalid 
$25fx= invalid
$25.67= valid