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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>PHP array_filter() 实例 - 自学教程(runoops.com)</title> </head> <body> <?php $array1 = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5]; $array2 = [6, 7, 8, 9, 10, 11, 12]; echo "Odd :<br />"; print_r(array_filter($array1, "odd")); echo "<br />"; echo "Even:<br />"; print_r(array_filter($array2, "even")); function odd($var) { // 返回输入整数是否为奇数(单数) return $var & 1; } function even($var) { // 返回输入整数是否为偶数 return !($var & 1); } ?> </body> </html>
运行结果: