<?php /** * 9 数组 each list array_map array_walk array_walk_recursive */ //each() 返回数组中的键名和键值生成新数组,如果指针结束,返回布尔值false /* $array1=array('webname'=>"博客",'weburl'=>"bbs.blog.com"); $array_new=each($array1); //生成新的数组: print_r($array_new); //输出:Array ( [1] => 博客 [value] => 博客 [0] => webname [key] => webname ) $array_new=each($array1); //生成新的数组: print_r($array_new); //输出:Array ( [1] => bbs.blog.com [value] => bbs.blog.com [0] => weburl [key] => weburl ) */ //list() 将索引数组的值,赋给变量 /*$array1=array("博客","bbs.blog.com"); list($value)=$array1; echo $value;//输出:博客*/ /*$array1=array('webname'=>"博客",'weburl'=>"bbs.blog.com"); while (list($k,$v)=each($array1)){ echo "键名:".$k."=>"."键值".$v; }//输出:键名:webname=>键值博客键名:weburl=>键值bbs.blog.com*/ //array_map() 数组的每一个元素应用,都经过回调函数处理,返回值是处理过的元素组成的新数组 /*$blog=array(11,22,33,440,55,660); function func_map($v){ echo $v; //输出:11223344055660 } $array_new=array_map('func_map',$blog);*/ /*$blog=array(11,22,33,440,55,660); function func_map($v){ if ($v>100){ return $v; } } $array_new=array_map('func_map',$blog); print_r($array_new);//输出:Array ( [0] => [1] => [2] => [3] => 440 [4] => [5] => 660 )*/ /*$blog=array(11,22,33,440,55,660); function func_map($v){ return $v+10; } $array_new=array_map('func_map',$blog); print_r($array_new);//输出:Array ( [0] => 21 [1] => 32 [2] => 43 [3] => 450 [4] => 65 [5] => 670 )*/ /*$arr1=array(1,2,3,4,5); $arr2=array("a","b","c","d","e"); function func4($arr1,$arr2){ //echo $arr1;//输出:12345 return array($arr2=>$arr1); } $arr0=array_map(func4,$arr1,$arr2); print_r($arr0); //输出:Array ( [0] => Array ( [a] => 1 ) [1] => Array ( [b] => 2 ) [2] => Array ( [c] => 3 ) [3] => Array ( [d] => 4 ) [4] => Array ( [e] => 5 ) )*/ //array_walk() 数组中的每一个元素,应用回调函数,成功返回true,失败返回false /*$array1=array('张三'=>1000,'李四'=>900,'王五'=>3000,'赵六'=>400); function func_walk(&$v,$k){ if ($v<1000){ $v+=500; } } if (array_walk($array1,func_walk)){ echo "加工资成功:"; print_r($array1); //输出:加工资成功:Array ( [张三] => 1000 [李四] => 1400 [王五] => 3000 [赵六] => 900 ) }*/ /*$array1=array('张三'=>1000,'李四'=>900,'王五'=>3000,'赵六'=>400); function func_walk(&$v,$k,$c=""){ if ($v<1000){ $v+=$c; } } if (array_walk($array1,func_walk,1000)){ echo "加工资成功:"; print_r($array1); //输出:加工资成功:Array ( [张三] => 1000 [李四] => 1900 [王五] => 3000 [赵六] => 1400 ) }*/ //array_walk_recursive() 递归的操作数组,使数组中的元素应用回调函数 $arr5 = array( array('uname' => '李四', 'money' => 100), array('uname' => '张三', 'money' => 600), array('uname' => '王五', 'money' => 700), array('uname' => '赵六', 'money' => 300) ); function fun5(&$v,$k){ //echo $v; //输出:李四500张三600王五700赵六800 if ($k=='money' && $v<300){ $v+=1000; } } array_walk_recursive($arr5,'fun5'); print_r($arr5);//输出:Array ( [0] => Array ( [uname] => 李四 [money] => 1100 ) [1] => Array ( [uname] => 张三 [money] => 600 ) [2] => Array ( [uname] => 王五 [money] => 700 ) [3] => Array ( [uname] => 赵六 [money] => 300 ) )