Research on PHP form form parameter passing details
为什么呢?因为表单的处理有GET和POST两种,怎么在这两种表单中都要传递一直do参数,而且要在后台通过同样的方式获取就一直是个很困惑的问题,今天经过几个小时的实验终于搞懂了,特发此文。
GET表单:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html;charset=gbk"/> <title>表单使用GET方式传值</title> </head> <body> <!-- action中的parm参数的值是无法传递到action-get.php的 --> <form action="action-get.php?parm=url-get" method="get"> <p> 姓名:<input type="text" name="name" /> <!-- 隐藏变量传值 --> <input type="hidden" name="hkey" value="hvalue" /> <!-- GET表单的隐藏变量传值可以通过$_GET["do"]获取 --> <input type="hidden" name="do" value="index" /> <!-- submit不设置name属性则不会出现在url中 --> <input type="submit" value="提交"/> </p> </form> </body> </html>
处理GET表单的PHP:
<pre class="brush:php;toolbar:false"> <?php echo "参数 name 的值通过\$_GET获取为 ".$_GET["name"]." ,"; echo "参数 name 的值通过\$_POST获取为 ".$_POST["name"]." ,"; echo "参数 name 的值通过\$_REQUEST获取为 ".$_REQUEST["name"]." .\r\n"; echo "参数 parm 的值通过\$_GET获取为 ".$_GET["parm"]." ,"; echo "参数 parm 的值通过\$_POST获取为 ".$_POST["parm"]." ,"; echo "参数 parm 的值通过\$_REQUEST获取为 ".$_REQUEST["parm"]." .\r\n"; echo "参数 hkey 的值通过\$_GET获取为 ".$_GET["hkey"]." ,"; echo "参数 hkey 的值通过\$_POST获取为 ".$_POST["hkey"]." ,"; echo "参数 hkey 的值通过\$_REQUEST获取为 ".$_REQUEST["hkey"]." .\r\n"; echo "参数 do 的值通过\$_GET获取为 ".$_GET["do"]." ,"; echo "参数 do 的值通过\$_POST获取为 ".$_POST["do"]." ,"; echo "参数 do 的值通过\$_REQUEST获取为 ".$_REQUEST["do"]." .\r\n"; ?>
处理结果输出:
参数 name 的值通过$_GET获取为 kj ,参数 name 的值通过$_POST获取为 ,参数 name 的值通过$_REQUEST获取为 kj .
参数 parm 的值通过$_GET获取为 ,参数 parm 的值通过$_POST获取为 ,参数 parm 的值通过$_REQUEST获取为 .
参数 hkey 的值通过$_GET获取为 hvalue ,参数 hkey 的值通过$_POST获取为 ,参数 hkey 的值通过$_REQUEST获取为 hvalue .
参数 do 的值通过$_GET获取为 index ,参数 do 的值通过$_POST获取为 ,参数 do 的值通过$_REQUEST获取为 index .
POST 表单:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html;charset=gbk"/> <title>表单使用POST方式传值</title> </head> <body> <!-- action中的parm和do参数可以在action-post.php中通过$_GET方式获取 --> <form action="action-post.php?parm=url-post&do=index" method="post"> <p> 姓名:<input type="text" name="name" /> <!-- 隐藏变量传值 --> <input type="hidden" name="hkey" value="hvalue" /> <input type="submit" value="提交"/> </p> </form> </body> </html>
处理 POST 表单的PHP:
<pre class="brush:php;toolbar:false"> <?php echo "参数 name 的值通过\$_GET获取为 ".$_GET["name"]." ,"; echo "参数 name 的值通过\$_POST获取为 ".$_POST["name"]." ,"; echo "参数 name 的值通过\$_REQUEST获取为 ".$_REQUEST["name"]." .\r\n"; echo "参数 parm 的值通过\$_GET获取为 ".$_GET["parm"]." ,"; echo "参数 parm 的值通过\$_POST获取为 ".$_POST["parm"]." ,"; echo "参数 parm 的值通过\$_REQUEST获取为 ".$_REQUEST["parm"]." .\r\n"; echo "参数 hkey 的值通过\$_GET获取为 ".$_GET["hkey"]." ,"; echo "参数 hkey 的值通过\$_POST获取为 ".$_POST["hkey"]." ,"; echo "参数 hkey 的值通过\$_REQUEST获取为 ".$_REQUEST["hkey"]." .\r\n"; echo "参数 do 的值通过\$_GET获取为 ".$_GET["do"]." ,"; echo "参数 do 的值通过\$_POST获取为 ".$_POST["do"]." ,"; echo "参数 do 的值通过\$_REQUEST获取为 ".$_REQUEST["do"]." .\r\n"; ?>
处理结果输出:
参数 name 的值通过$_GET获取为 ,参数 name 的值通过$_POST获取为 zkj ,参数 name 的值通过$_REQUEST获取为 zkj .
参数 parm 的值通过$_GET获取为 url-post ,参数 parm 的值通过$_POST获取为 ,参数 parm 的值通过$_REQUEST获取为 url-post .
参数 hkey 的值通过$_GET获取为 ,参数 hkey 的值通过$_POST获取为 hvalue ,参数 hkey 的值通过$_REQUEST获取为 hvalue .
参数 do 的值通过$_GET获取为 index ,参数 do 的值通过$_POST获取为 ,参数 do 的值通过$_REQUEST获取为 index .
结论:
GET表单值可以通过_GET获取;但通过action的url参数设置的参数总是获取不到的
POST表单值可以通过_POST获取;但通过action的url参数设置的参数则可以通过_GET获取到
同一变量都可以通过_GET获取,但在GET表单中通过隐藏变量设置,在POST表单中则通过action的url参数设置
更多PHP form 表单传参明细研究相关文章请关注PHP中文网!

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