arrays - Why is the output by PHP natsort() function wrong in the following situation? -


i reading natsort() on php manual. show examples headline "natsort() examples demonstrating potential gotchas". think means out of natsort() different in these examples supposed be. here code:

<?php echo "negative numbers\n"; $negative = array('-5','3','-2','0','-1000','9','1'); natsort($negative); print_r($negative);  echo "zero padding\n"; $zeros = array('09', '8', '10', '009', '011', '0');  natsort($zeros); print_r($zeros); ?>

the output in first case is:

array (   [2] => -2   [0] => -5   [4] => -1000   [3] => 0   [6] => 1   [1] => 3   [5] => 9 )

i understand wrong because negative number not sorted smaller bigger.

here output of second example:

array (   [5] => 0   [1] => 8   [0] => 09   [3] => 009   [2] => 10   [4] => 011  )

what output supposed in case? me, seemed right order. numbers in ascending order. explanation me understand function , avoid mistakes when using in future.

thanks.


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