题目：有以下2个二维数组

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$a=Array(0 => Array(id => 66,class_name => www.iiwnet.com),1 => Array(id => 67,class_name => linux ));
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$b=Array(0 => Array(class_count=> 8),1 => Array(class_count => 2));
两个数组内容如上，如何把$a和$b合并成为一个新的二维数组，要求新数组内容如下：

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Array(0 => Array(id => 66,class_name => www.iiwnet.com，class_count=> 8),1 => Array(id => 67,class_name => linux ，class_count => 2));
这个题目一定有人遇到过 正好今天群里有人问 就给出2种解法
以下代码由 PHP教程网 原创提供
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方法一：
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    function arrpreg(){
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        $a=Array(0 => Array(id => 66,class_name => www.iiwnet.com),1 => Array(id => 67,class_name => linux ));
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        $b=Array(0 => Array(class_count=> 8),1 => Array(class_count => 2));
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        $arr = array();
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        foreach ($a as $k => $r) {
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            foreach($r as $k1 => $r1){
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                $arr[$k][$k1] = $r1;
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            }
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        }  
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        foreach ($b as $k => $r) {
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            foreach($r as $k1 => $r1){
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                $arr[$k][$k1] = $r1;
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            }
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        }
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        return $arr;
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    }
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    $ar= arrpreg();  
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    echo '<pre>';
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     print_r($ar);
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    echo '</pre>';
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    ?>
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方法二：
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    $a = array(0 => Array(id => 66,class_name => www.iiwnet.com),1 => Array(id => 67,class_name => linux ));
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    $b = array(0 => Array(class_count=> 8),1 => Array(class_count => 2));
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    $arr = array();
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    foreach($a as $k=>$r){
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        $arr[] = array_merge($r,$b[$k]);
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    }
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    echo '<pre>';
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    print_r($arr);
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    echo '</pre>';

转自http://zzdd.meiwang360.com/wenz/32.html

PHP二维数组合并,根据某个key合并

最终解决方案：