PHP FILTER_VALIDATE_URL 過濾器
定義和用法
FILTER_VALIDATE_URL 過濾器把值作為URL 來驗證。
- Name: "validate_url"
- ID-number: 273
可能的標誌:
- FILTER_FLAG_SCHEME_REQUIRED - 要求URL 是RFC 兼容URL(比如http://example)
- FILTER_FLAG_HOST_REQUIRED - 要求URL 包含主機名(比如http://www.example.com)
- FILTER_FLAG_PATH_REQUIRED - 要求URL 在域名後存在路徑(比如www.example.com/example1/test2/)
- FILTER_FLAG_QUERY_REQUIRED - 要求URL 存在查詢字符串(比如"example.php?name=Peter&age=37")
實例1
<?php
$url = "http://www.example.com";
if(!filter_var($url, FILTER_VALIDATE_URL))
{
echo "URL is not valid";
}
else
{
echo "URL is valid";
}
?>
$url = "http://www.example.com";
if(!filter_var($url, FILTER_VALIDATE_URL))
{
echo "URL is not valid";
}
else
{
echo "URL is valid";
}
?>
代碼的輸出如下所示:
URL is valid
實例2
<?php
$url = "example.php?name=Peter&age=37";
if(!filter_var($url, FILTER_VALIDATE_URL,
FILTER_FLAG_QUERY_REQUIRED))
{
echo "URL is not valid";
}
else
{
echo "URL is valid";
}
?>
$url = "example.php?name=Peter&age=37";
if(!filter_var($url, FILTER_VALIDATE_URL,
FILTER_FLAG_QUERY_REQUIRED))
{
echo "URL is not valid";
}
else
{
echo "URL is valid";
}
?>
代碼的輸出如下所示:
URL is valid
完整的PHP Filter參考手冊