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knittingfrenzy18

Hi there,

How would you do a callback function in PHP? I know this is simple but I can't seem to figure it out.

mysql_query($sqlinsert, $link);

/*begin pseudocode

if(success that that query was inserted):
(
print "Yay, it worked!";
)

end pseudocode*/

Something like that.

Red

knittingfrenzy18

bump

Someone should know this...

traq

you can use callbacks (syntactically, similar to the way you do in javascript) in PHP 5.3+.

In earlier versions, depending on the specific goal, you might find call_user_func() or call_user_func_array() helpful. Certain functions include a callback parameter, as well (again, depends on what you're doing).

However, for what you're doing, there's no need.
Your "psuedocode" is very close to actual code: it's a "conditional" code block, not a "callback."

<?php

$result = mysqli_query( "INSERT whatever",$link );
if( mysqli_affected_rows( $link ) ){
    /* do something */
}

edit:
Also, you may notice that I used mysqli_* functions instead of mysql_*. ext/mysql is outdated; if you have any choice in the matter, you should not be using it. ext/mysqli or PDO are the recommended APIs for mysql.

mweldan



<?php
mysql_query($sqlinsert, $link) or die("now i go die."); 
echo "heyyy i am still alive let's do the next thing..";
?>

karlpcrowley

if(mysql_query($sqlinsert, $link)){
	 //Query worked
} else {
	 //Query failed
}

treehouse : what would you like to learn today?

Forums

simple I don't know how PHP