阵列和foreach [英] Array and foreach

问题描述

$posts = array(
"message" => 'this is a test message'
);

foreach ($posts as $post) {
     echo $post['message'];
}

为什么上面的code只能输出在消息的第一个字母？ T。

Why does the above code only output the first letter in message? "t".

谢谢！

推荐答案

的foreach采取数组中的每个元素，并将其分配给变量。为了让我相信你期待你的结果只需要做：

foreach takes each element of the array and assigns it to the variable. To get the results I assume you are expecting you just need to do:

foreach ($posts as $post) {
   echo $post;
}

的细节，为什么你的code没有工作： $岗位将数组元素的内容 - 在这种情况下的字符串。因为PHP不是强类型/类型支持杂耍，你可以在一个字符串的工作其实就好像它是一个数组，并获得序列中的每个字符：

The specifics as to why your code didn't work: $post would be the contents of the array element - in this case a string. Because PHP isn't strongly typed / supports type juggling, you can in fact work with a string as if it were an array, and get to each character in the sequence:

foreach ($posts as $post) {
    echo $post[0]; //'t'
    echo $post[1]; //'h'
}

显然 $信息['消息'] 因此它不是一个有效的元素，并有从没有明确的转换（字符串）信息 到 INT ，所以这个evals到 $讯息[0] 。

Obviously $post['message'] therefore is not a valid element, and there is no explicit conversion from (string)'message' to int, so this evals to $post[0].

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