PHP数组排序技巧与方法大全

$fruits = ['banana', 'apple', 'orange'];
sort($fruits);
// 结果：['apple', 'banana', 'orange']

$scores = ['Tom' => 85, 'Jerry' => 92, 'Bob' => 78];
asort($scores);
// 结果：['Bob'=>78, 'Tom'=>85, 'Jerry'=>92]

$data = ['z' => 'last', 'a' => 'first', 'm' => 'middle'];
ksort($data);
// 结果：['a'=>'first', 'm'=>'middle', 'z'=>'last']

$numbers = [3, 1, 4, 1, 5];
rsort($numbers);
// 结果：[5, 4, 3, 1, 1]

$words = ['php', 'javascript', 'html', 'css'];
usort($words, function($a, $b) {
    return strlen($a) - strlen($b);
});
// 结果：['php','css','html','javascript']

$students = [
    ['name' => 'Alice', 'score' => 88],
    ['name' => 'Bob',   'score' => 95],
    ['name' => 'Carol', 'score' => 70]
];
<p>$scores = array_column($students, 'score');
array_multisort($scores, SORT_DESC, $students);
// 结果：$students 按 score 从高到低排列</p>