How to use foreach() to traverse two-dimensional and multi-dimensional arrays-PHP Tutorial-php.cn

How to use foreach() to traverse two-dimensional and multi-dimensional arrays

伊谢尔伦

Release： 2023-03-11 07:12:01

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7389 people have browsed it

The first type

I want to use foreach() to traverse the entire two-dimensional array:

$team = array(&#39;lk&#39;,&#39;ok&#39;);
$book = array(&#39;linux服务器配置与管理&#39;,$team);
 
foreach($book as $k=>$val) //for $book each $value( as )
echo $k.&#39;=>&#39;.$val.&#39;&#39;;

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The output result is:

0=>linux server configuration and management
1=>Array

Of course, I actually want all the specific content, not the output array. . .

So the following approach should be adopted, adding a judgment statement:

$team = array(&#39;lk&#39;,&#39;ok&#39;);
$book = array(&#39;linux服务器配置与管理&#39;,$team);
 
foreach($book as $k=>$val) //意思是for $book each $value( as )
if( is_array($val) ) foreach( $val as $value) echo $value.&#39;&#39;;
else echo $k.&#39;=>&#39;.$val.&#39;&#39;;

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The output is:

0=>linux server configuration With management
lk
ok

echo "<br>";
echo "<h1>php遍历二维数组</h1>";
//$team = array(&#39;lk&#39;,&#39;ok&#39;);
//$book = array(&#39;linux服务器配置与管理&#39;,$team);
$arr = array(
array(&#39;name&#39;=>&#39;系统配置&#39;,&#39;url&#39;=>&#39;?action=config&do=config&#39;),
array(&#39;name&#39;=>&#39;验证码配置&#39;,&#39;url&#39;=>&#39;?action=config&do=seccode&#39;),
array(&#39;name&#39;=>&#39;模板管理&#39;,&#39;url&#39;=>&#39;?action=config&do=tpl&#39;),
array(&#39;name&#39;=>&#39;帐号管理&#39;,&#39;url&#39;=>&#39;?action=admin&do=list&#39;),
array(&#39;name&#39;=>&#39;添加帐号&#39;,&#39;url&#39;=>&#39;?action=admin&do=add&#39;));
foreach($arr as $k=>$val){
  echo "name:".$val["name"]."/n";
}

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The second type

foreach() traverses multidimensional array:

<?php 
//声明一个三维数组 
$info=array( 
"user"=>array( 
array(1,"zhangsan",20,"nan"), 
array(2,"lisi",20,"nan"), 
array(3,"wangwu",25,"nv") 
), 
"score"=>array( 
array(1,100,98,95,96), 
array(2,56,98,87,84), 
array(3,68,75,84,79) 
), 
"connect"=>array( 
array(1,&#39;2468246&#39;,"salkh@bbs.com"), 
array(2,&#39;343681643&#39;,"aikdki@sina.com"), 
array(3,&#39;3618468&#39;,"42816@qq.com") 
) 
); 
//循环遍历，输出一个表格 
foreach($info as $tableName=>$table){ 
echo "<table align=&#39;center&#39; border=&#39;1&#39; width=300>"; 
echo "<caption><h1>".$tableName."</h1></caption>";//以每个数组的键值作为表名 
foreach($table as $row){ 
echo "<tr>"; 
foreach($row as $col){ 
echo "<td>".$col."</td>"; 
} 
echo "</tr>"; 
} 
echo "</table>"; 
} 
?>

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