PHP的 - 这是点击按钮 [英] Php - Which button is clicked

问题描述

我写一个剧本，我提供两个按钮格兰特和撤销给用户。问题是，他们两个被设置和授权按钮，始终以precedence。

下面是示例code

 ＆LT;表格名称=form_accessID =form_access行动=方法=POST级=访问＆GT;
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|＆LT;输入类型=隐藏的名字=accessactionVALUE =授权访问/＆GT;
＆LT;输入类型=隐藏的名字=revokeactionVALUE =撤销访问/＆GT;＆LT;一个ID =_ access_btt级=按钮的href =＃＆GT;授权访问和LT; / A＆GT;    ＆LT; IMG类=ajaxload的风格=显示：无; ID =ajaxldSRC =图像/ Ajax的loader.gif/＆GT;
    ＆LT;一个ID =_ revoke_btt级=按钮的href =＃＆GT;撤销交通＆LT; / A＆GT;    ＆LT; IMG类=ajaxload的风格=显示：无; ID =ajaxld1SRC =图像/ Ajax的loader.gif/＆GT;
＆LT; /表及GT;
 

解决方案

而不是使用两个隐藏的元素，你为什么不使用一个隐藏的元素，这样的事情？

例如：你可以使用：

 ＆LT;输入类型=隐藏的名字=accessPermissionVALUE =/＆GT;
 

和取决于哪个按钮用户点击，借助JavaScript代码，你可以设置这个动作的价值也：

  document.form_access.accessPermission.value =撤销访问权
 

和

  document.form_access.accessPermission.value =授权访问
 

，然后提交表单！

所以在最后，你可以只检查值$ _REQUEST ['accessPermission']在你的PHP，

，你会得到什么价值，你已经为你的隐藏表单元素accessPermission：

如果它的值是撤销访问，您将获得$ _REQUEST ['accessPermission']为撤销访问权

如果它的值是授权访问您将获得$ _REQUEST ['accessPermission']为授予访问权

因此​​，在结束时，你可以构建你的形式：

 ＆LT;表格名称=form_accessID =form_access行动=方法=POST级=访问＆GT;
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|＆LT;输入类型=隐藏的名字=accessPermissionVALUE =/＆GT;＆LT;一个ID =_ access_btt级=按钮HREF =JavaScript的：document.form_access.accessPermission.value ='授予访问权＆GT;授权访问和LT; / A＆GT;    ＆LT; IMG类=ajaxload的风格=显示：无; ID =ajaxldSRC =图像/ Ajax的loader.gif/＆GT;
    ＆LT;一个ID =_ revoke_btt级=按钮HREF =JavaScript的：document.form_access.accessPermission.value ='撤销访问权'＆GT;撤销交通＆LT; / A＆GT;    ＆LT; IMG类=ajaxload的风格=显示：无; ID =ajaxld1SRC =图像/ Ajax的loader.gif/＆GT;
＆LT; /表及GT;
 

---

和这两个值都设置，因为，它的真正具体由行设置：

 ＆LT;输入类型=隐藏的名字=accessactionVALUE =授权访问/＆GT;
＆LT;输入类型=隐藏的名字=revokeactionVALUE =撤销访问/＆GT;
 

捐赠行动花费precedence，因为这是第一次出现。

I am writing a script where I provide two buttons "Grant" and "Revoke" to the user. The problem is that both of them are set and "Grant" button always takes precedence.

Below is Sample code

<form name="form_access" id="form_access" action="" method="POST" class="access">
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<input type="hidden" name="accessaction" value="Grant Access"/>
<input type="hidden" name="revokeaction" value="Revoke Access"/>

<a id="_access_btt" class="button" href="#">Grant Access</a>

    <img class="ajaxload" style="display:none;" id="ajaxld" src="images/ajax-loader.gif"/>
    <a id="_revoke_btt" class="button" href="#">Revoke Access</a>

    <img class="ajaxload" style="display:none;" id="ajaxld1" src="images/ajax-loader.gif"/>
</form>

解决方案

Rather than using two hidden elements, Why dont you use a single hidden element, something like this?

for example: you could use:

<input type="hidden" name="accessPermission" value=""/>

and depending upon what button user clicks, with the help of javascript you could set this action's value too:

document.form_access.accessPermission.value = "Revoke Access"

and

document.form_access.accessPermission.value = "Grant Access"

and then submit the form!

so in the end, you can just check value $_REQUEST['accessPermission'] in your PHP,

and you will get whatever value you have set for your hidden form element accessPermission:

if its value is Revoke Access you will get $_REQUEST['accessPermission'] as 'Revoke Access'

if its value is Grant Access you will get $_REQUEST['accessPermission'] as 'Grant Access'

So at the end, you can construct your form as:

<form name="form_access" id="form_access" action="" method="POST" class="access">
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<input type="hidden" name="accessPermission" value=""/>

<a id="_access_btt" class="button" href="javascript:document.form_access.accessPermission.value = 'Grant Access'">Grant Access</a>

    <img class="ajaxload" style="display:none;" id="ajaxld" src="images/ajax-loader.gif"/>
    <a id="_revoke_btt" class="button" href="javascript:document.form_access.accessPermission.value = 'Revoke Access'">Revoke Access</a>

    <img class="ajaxload" style="display:none;" id="ajaxld1" src="images/ajax-loader.gif"/>
</form>

---

And Both the values are set because, its really specifically set by the lines:

<input type="hidden" name="accessaction" value="Grant Access"/>
<input type="hidden" name="revokeaction" value="Revoke Access"/>

Grant Action takes precedence, because that's appears first.

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