MySQL - Remove hyphens from phone numbers (Asteridex, find & replace)

gistfile1.txt

In this example, user1 is the table name, out is the field name.
I'm removing hyphens from phone numbers.
Note the mysql names have `backticks` around them while the text fields have 'single quotes' around them.

MySQL:
````
update `user1`
set `out` = replace(`out`, '-', '');
````

PHP:
````
$sql = "update `user1`\n"
    . "set `out` = replace(`out`, \'-\', \'\')";
````