阵列循环语法

Question

如果我有：

$data = array(
    'id01' => array(
    'firstName' => 'Eric', 
    'lastName' => 'Smith', 
), 
    'id02' => array(
    'firstName' => 'John', 
    'lastName' => 'Turner', 
), 
); 

foreach ($data as $key){ 
    print "$key[firstName]<br>"; 
    echo $key[0]; 
} 

的$key[0]部分是不工作...基本上我试图输出ID01，然后ID02，基本阵列的ID部分的for循环是处理...

关于正确语法的任何想法？

Answer 1

你需要的是

foreach ($data as $key => $val){ 
    print "$val[firstName]<br>"; //changed to $val 
    echo $key; //prints id01, id02 
} 

Answer 2

没有键0，只是第一个和最后一个名字 - 你需要这样做

foreach ($data as $key => $value) 
{ 
    echo "Key is " . $key . ", value of firstName 
      is " . $value["firstName"] . "<br />"; 
} 

Answer 3

尝试：

foreach ($data as $key=>$value) 

Answer 4

东西喜欢这个？

foreach ($data as $key=>$value){ 
    print "$value[firstName]<br>"; 
    echo $key.'<br />'; 
}