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  <head>
   <title> all_sort.php </title>
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  </head> <body>
<?php
 //sort 排序
 echo "sort 排序<br>";
 $fruits = array("lemon", "orange", "banana", "apple");
 sort($fruits);
 foreach ($fruits as $key => $val) {
 echo "fruits[".$key."] = " . $val . "<br>";
 }
 //sort 排序
 //fruits[0] = apple
 //fruits[1] = banana
 //fruits[2] = lemon
 //fruits[3] = orange//asort 排序
 echo "asort 排序<br>";
 $fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" =>"apple");
 asort($fruits);
 foreach ($fruits as $key => $val) {
 echo "$key = $val <br>";
 }
 //asort 排序
 //c = apple 
 //b = banana 
 //d = lemon 
 //a = orange //ksort 排序
 echo "ksort 排序<br>";
 $fruits = array("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple");
 ksort($fruits);
 foreach ($fruits as $key => $val) {
 echo "$key = $val <br>";
 }
 //ksort 排序
 //a = orange 
 //b = banana 
 //c = apple 
 //d = lemon //rsort 排序
 echo "rsort 排序<br>";
 $fruits = array("lemon", "orange", "banana", "apple");
 rsort($fruits);
 foreach ($fruits as $key => $val) {
 echo "$key = $val <br>";
 }
 //rsort 排序
 //0 = orange 
 //1 = lemon 
 //2 = banana 
 //3 = apple //arsoft 排序
 echo "arsort 排序<br>";
 $fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" =>
 "apple");
 arsort($fruits);
 foreach ($fruits as $key => $val) {
 echo "$key = $val <br>";
 }
 //arsort 排序
 //a = orange 
 //d = lemon 
 //b = banana 
 //c = apple //krsoft 排序
 echo "krsort 排序<br>";
 $fruits = array("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple");
 krsort($fruits);
 foreach ($fruits as $key => $val) {
 echo "$key = $val <br>";
 }
 //krsort 排序
 //d = lemon 
 //c = apple 
 //b = banana 
 //a = orange 
 ?> </body>
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