Question : With regards to correlated subqueries does anybody know what the logical query processing order?

With regards to correlated subqueries does anybody know what the logical query processing order?

Answer : With regards to correlated subqueries does anybody know what the logical query processing order?

If your address is just a simple string (no '\n's in it) then this regex will work
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<?php


     $test = "dasdas, asdasd, 10 the high st, as dsad, asd as, asd asd,sdsad";
     
     $pattern = '/^[^0-9]+([0-9]{1}).+$/';

     preg_match( $pattern, $test, $matches, PREG_OFFSET_CAPTURE );

     echo "First digit at position " . $matches[1][1];
?>

Outputs 

First digit at position 16
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