示例1:从数组中选择一个随机元素的键 $input_array=array("apple","banana","cherry","orange");$random_key=array_rand($input_array);echo$input_array[$random_key];//输出"apple"、"banana"、"cherry"或"orange"中的一个 示例2:从数组中选择多个随机元素的键 $input_array=array("apple","banana",...
<?php$array=array("apple","banana","cherry","orange","grape");// 使用 array_rand() 函数从数组中随机选择一个元素的键$random_key=array_rand($array);// 使用随机键获取数组中对应的元素$random_element=$array[$random_key];echo"Random element: ".$random_element;?> 上述代码会输出类似以下结...
PHP提供了几个函数来生成随机数,包括rand()和mt_rand()。rand()生成一个指定范围内的随机整数,而mt_rand()是rand()的一个改进版本,通常提供更好的性能。例如: php $randomIndex = mt_rand(0, count($fruits) - 1); 这行代码生成了一个从0到数组长度减1之间的随机整数,用作数组的索引。 展示如何使用...
<?php $input_array = array("apple", "banana", "cherry", "orange", "grape"); // 随机获取一个元素的键 $random_key = array_rand($input_array); echo "Random key: " . $random_key . "\n"; // 随机获取两个元素的键 $random_keys = array_rand($input_array, 2); echo "Random ke...
<?php // 设置随机数生成器的种子 srand(microtime(true) * 10000); $array = array("apple", "banana", "cherry", "orange", "grape"); // 从数组中随机选择一个元素的键 $random_key = array_rand($array); echo "Random element: " . $array[$random_key] . "\n"; ?> 复制代码 在这个...
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basic_array_rand.php <?php $colors = ["red", "green", "blue", "yellow", "orange"]; $randomKey = array_rand($colors); echo "Random color: " . $colors[$randomKey]; This picks one random key from the colors array. The key is used to access and display the corresponding color ...
完整的 PHP Array 参考手册实例 返回一个包含随机键名的数组: <?php $a=array("red","green","blue","yellow","brown"); $random_keys=array_rand($a,3); echo $a[$random_keys[0]].""; echo $a[$random_keys[1]].""; echo $a[$random_keys[2]]; ?> 运行实例 » 定义和用法array...
PHP array_rand() 函数 PHP Array 函数 实例 返回包含随机键名的数组: ?php$a=array(red,green,blue,yellow,brown);$random_keys= array_rand($a,3) ;echo $a[$random_keys[0]].br;echo $a[$random_keys[1]].br;echo $a[$random_keys[2]];
If the array elements are unique, and are all integers or strings, here is a simple way to pick $n random *values* (not keys) from an array $array: <?php array_rand(array_flip($array), $n); ?>up down 76 Anonymous ¶ 12 years ago It doesn't explicitly say it in the doc...