从数组类型转换为php函数参数的字符串

Question

I have the following snippet of code.

<?php
$arr = array('str' => 'arr');
var_dump(htmlspecialchars($arr));
?>

And has the following output.

Warning: htmlspecialchars() expects parameter 1 to be string, array given in /Users/shodoco/test.php on line 3
NULL

I am wondering why I am getting this output. According to the PHP manual here , arrays are always converted to the string "Array". htmlspecialchars() takes its first argument as a string, and my understanding is the array should be implicitly converted to string "Array". But in this example, I am getting NULL. What happens here?

Answer 1

Can you try this:

echo "<pre>";
print_r($yourArray);
echo "<pre>";

don't change anything on there, just keep the array as is, i find this the best way of inspecting arrays as strings.

hope that answers your query?