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数组元素的回调处理8月27日19:55
A骆长林的博客
Original
562 people have browsed it

实例

<meta charset="utf-8">
<?php
//1.array_filter() 回调处理数组中的每个元素的值,仅返回结果为true的元素
$arr1 = [0,4,'',null,'0',false,'php'];
echo '<pre>';
echo var_export($arr1,true).'<br>';
$arr2 = array_filter($arr1);
echo var_export($arr2).'<br>';

$arr3 = ['html','css','javascript','asp','php'];
$arr4 = array_filter($arr3,function($value){
    return $value !== 'asp';
});
echo var_export($arr4).'<br>';

//2.array_walk() 对数组中每个元素的键和值进行处理
$arr5 = ['name'=>'admin','email'=>'admin@php.cn'];
echo var_export($arr5).'<hr>';
array_walk($arr5,function(&$value,$keys){
    echo $keys.':'.$value.'<br>';
});
echo '<br>';

array_walk($arr5,function($value,$key,$name){
    if ($value != $name){
        exit('无权查看');
    }else{
        exit($key.':'.$value);
    }
},'admin');

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实例

<meta charset="utf-8">
<?php
//1.array_filter() 回调处理数组中的每个元素的值,仅返回结果为true的元素
$arr1 = [0,4,'',null,'0',false,'php'];
echo '<pre>';
echo var_export($arr1,true).'<br>';
$arr2 = array_filter($arr1);
echo var_export($arr2).'<br>';

$arr3 = ['html','css','javascript','asp','php'];
$arr4 = array_filter($arr3,function($value){
    return $value !== 'asp';
});
echo var_export($arr4).'<br>';

//2.array_walk() 对数组中每个元素的键和值进行处理
$arr5 = ['name'=>'admin','email'=>'admin@php.cn'];
echo var_export($arr5).'<hr>';
array_walk($arr5,function(&$value,$keys){
    echo $keys.':'.$value.'<br>';
});
echo '<br>';

array_walk($arr5,function($value,$key,$name){
    if ($value != $name){
        exit('无权查看');
    }else{
        exit($key.':'.$value);
    }
},'admin');

运行实例 »

点击 "运行实例" 按钮查看在线实例


Correction status:qualified

Teacher's comments:加上自己的总结就更好了!
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