例:
$test={"A":1,"B":3,"C":2,"D":1,"E":1};取得:
$result={"B":3,"C":2,"A":1,"D":1,"E":1};
试过rsort($test),不行。
很像sql语句中的orderby,能否有办法？例:
$test={"A":1,"B":3,"C":2,"D":1,"E":1};取得:
$result={"B":3,"C":2,"A":1,"D":1,"E":1};
试过rsort($test),不行。
很像sql语句中的orderby,能否有办法？ドキュメントを見てください
>>> arsort($test)
>>> $test
=> [
"B" => 3,
"c" => 2,
"e" => 1,
"d" => 1,
"A" => 1,
]function cmp($a, $b)
{
if ($a == $b) {
return 0;
}
return ($a < $b) ? -1 : 1;
}
$a = array(3, 2, 5, 6, 1);
usort($a, "cmp");
foreach ($a as $key => $value) {
echo "$key: $value\n";
}この関数 array_multisort を見てみましょう
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