Question

php 自定义函数{大括号}内 $data = trim($data); 是做什么用的?

$name = $email = $gender = $comment = $website = "";

if ($_SERVER["REQUEST_METHOD"] == "POST") {
$name = test_input($_POST["name"]);
$email = test_input($_POST["email"]);
$website = test_input($_POST["website"]);
$comment = test_input($_POST["comment"]);
$gender = test_input($_POST["gender"]);
}

function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>

php 自定义函数{大括号}内 $data = trim($data); 是做什么用的?
..
.

Answer 1

trim() 函数移除字符串两侧的空白字符或其他预定义字符。

具体:http://www.w3school.com.cn/php/func_string_trim.asp