I have an array like this:
$events = array(
array(
'2003-07-01',
'Event Title 1',
'1' //ID Number (not unique)
),
array(
'2003-07-02',
'Event Title 3',
'22'
),
array(
'2003-07-06',
'Event Title 3',
'35'
)
);
I want to sort it by date. How would I do it?
I read the documentation for usort(), but I can't get it to work right.
Any suggestions? 1 13660
Thank you so much, Jason. I didn't understand what the extra function
was for until you posted that.
It works perfectly, now. Thanks again. Sorting by date from the usort docs on php.net - sorting a multidimensiona l array:
<begin> function cmp ($a, $b) { //return strcmp($a["fruit"], $b["fruit"]); // in the case of the above array // note we are comparing the first element of each array if ( $a[0] < $b[0] ) { return -1; } if ( $a[0] > $b[0] ) { return 1; } // they are equal return 0; }
// we're using the array supplied above by Brian /* $fruits[0]["fruit"] = "lemons"; $fruits[1]["fruit"] = "apples"; $fruits[2]["fruit"] = "grapes"; */
// again, using data supplied by Brian usort($events, "cmp"); //usort($fruits, "cmp"); <end>
This should sort the multidimensiona l array by the first element (index 0). Incidentally, you could make it sort in descending order by switching the 1 and -1 in the "cmp" function.
Also, doing this in objects gets kind of tricky, read the user supplied notes, there's a lot of useful stuff in there.
Jason
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