如何验证提交的表单是否为空？
My form consists of different types of inputs.
Is there a way of checking if form has been submitted with any user input?
我的表单由不同类型的输入组成。 p>
有没有办法 检查表单是否已与任何用户输入一起提交？ p> div>
Is there a way of checking if an entire form is blank?
Without checking each individual input?
In short. No there is not.
You could treat $_POST as an array and check each entry in a loop, but you must be aware of items that are automatically filled, like $_POST['submit'] or something similar.
Run the input through array_filter - it will return empty array if there is no single value in the array. If there is a value, the array will be non-empty.
Keep in mind that this way even if just one checkbox is checked form will be considered non-empty.
To see if anything is present (either a text input, or at least a checkbox value=1) you might use:
strlen(join($_POST))
Obviously only if it's a POST form, and that's not a big help either if you have radio or select boxes with a default. Also the submit button may not add a string by itself (don't give it a name=).