Remove all non-numeric characters from a field

Question

I have a results set from a webform that includes a phone number for each set. the format of this phone number is not enforced (some are xxxxxxxxxx, some are (xxx)xxx-xxxx a

Answer 1

This may work but little tedious:

Get the list of number from the table

$result = mysql_query("Select ID, number from Table"); 

On each value

while ($row = mysql_fetch_array($result)) { 
$ID = $row["ID"]; 
$NUM = $row["number"]; 

Then do a regex pattern and update that value to the ID

$NUM = eregi_replace("whateverregex","",$NUM); 

$sql = mysql_query("Update Table set number = $NUM where ID = $ID"); 
}