finding a just the first key in an array

[niche]

foreach($_POST as $key => $value) { $up = $key; echo $up; } will echo all the keys.How do I change this script to echo only the first key? Thanks

[jeffman]

You're on the right track. Look at the each function. array_keys might also simplify the task.I am not sure if the sequence of post array elements is guaranteed by rule, or unwritten agreement, or nothing at all. Someone might want to chime in on that.

[niche]

<?php$foo = array("LAMS_ZV9014" => "25.00" , "ABC" => "10.00" );$bar = each($foo);print_r($bar);?>produces: Array ( [1] => 25.00 [value] => 25.00 [0] => LAMS_ZV9014 [key] => LAMS_ZV9014 ) so far, i'm chasing my tail trying to get the key from $bar into a local variable. I'm so close, but yet so far.ideas?

[ShadowMage]

<?php$foo = array("LAMS_ZV9014" => "25.00" , "ABC" => "10.00" );$bar = each($foo);print_r($bar);?>produces: Array ( [1] => 25.00 [value] => 25.00 [0] => LAMS_ZV9014 [key] => LAMS_ZV9014 ) so far, i'm chasing my tail trying to get the key from $bar into a local variable. I'm so close, but yet so far.ideas?

Array ( [1] => 25.00 [value] => 25.00 [0] => LAMS_ZV9014 [key] => LAMS_ZV9014 )echo $bar['key'];

[jeffman]

$bar[0] or $bar['key'] returns what you want. If you call each() again, it will return the second pair, but the first time gets you the first pair.

[niche]

If that had been a snake, it would have bit me. Fortunately, Deirdre's Dad and ShadowMage are faster!Thanks,Niche

[boen_robot]

It's a good think you aren't dealing with a Python (script) then :)BTW, you could also break unconditinally at the first iteration, like:

foreach($_POST as $key => $value) { $up = $key; echo $up; break;}

But that particular approach is best only when you have some conditions within the loop... like, if you wanted the first N keys for example.

[niche]

Nice touch. Thanks boen_robot.