title: Can triggers call PHP Scripts?
body: <p>I have written a trigger, but mysql doesn't like it: </p>
  
  <p>Code :</p>
  
  <pre><code>create trigger triggers_on_comand_line AFTER UPDATE on test1 
  for each row 
  begin 
  IF total_volume &gt;= used_volume
  THEN
  \! echo "php -f /home/test.php" 
  END; 
  </code></pre>
  
  <p>I got this error :</p>
  
  <p>** MySQL said: Documentation 1064 - 064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '! echo "php -f /home/test.php" at line 6  ** </p>
  
  <p>Thanks</p>