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键名相同且必须是字符
$a = array("w"=>1,1,2,3,4);
$b = array("w"=>2,1,2,3,5);
$a = array_merge($a,$b);
var_dump($a);
这样写被不被认为是字符,且还会在后面添加
$a = array("1"=>1,1,2,3,4);
$b = array("1"=>2,1,2,3,5);
$a = array_merge($a,$b);
var_dump($a);
案例
<?php
$school=[
'class'=>[
'一班'=>[
'name'=>['小明','小红','小刚'],
'sex'=>['男','女','男'],
],
'三班'=>[
'name'=>['小步','小心','小美'],
'sex'=>['男','女','女'],
]
],
];
$fu=[
'一班'=>[
'name'=>['小白'],
'sex'=>['男'],
],
'三班'=>[
'name'=>['小可'],
'sex'=>['女'],
],
];
//先判断是否是一个班级的
//然后按名字覆盖
//性别覆盖
foreach($school['class'] as $k1=>$vo1){
foreach($fu as $k2=>$vo2){
if($k1==$k2){
$school['class'][$k2]['name'] =array_merge($vo1['name'],$vo2['name']);
$school['class'][$k2]['sex'] = array_merge($vo1['sex'],$vo2['sex']);
}else{
}
}
}
echo "<pre>";
var_dump($school['class']);
