html - Unorder print out of echo in php -


i don't why happen? in php code i'm trying echo job status retrieve database mysql function newjob. prints old*job status: instead of job status: old. client side , server side programming run @ same time or have order compile? 

echo '<b>'.'job status: '.'</b>' .newjob($row['new_job'])."<br />";  function newjob($num) { if($num == 1) { echo "new"; }else{     echo "old";     } }

never make function output value.

but return it.

echo '<b>'.'job status: '.'</b>' .newjob($row['new_job'])."<br />";  function newjob($num) {     if($num == 1) {         return "new";     }else{         return "old";     } }

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