Php - 单击了哪个按钮

Question

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>

Answer 1

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>

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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.