My form consists of different types of inputs.
Is there a way of checking if form has been submitted with any user input?
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3 Answers
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 $_POST['submit'] or something similar.
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Run the input through array_filter - it will return empty array if there is no single value in the array. If there is a value, the array will be non-empty.
Keep in mind that this way even if just one checkbox is checked form will be considered non-empty.
answered Aug 26, 2011 at 13:05
Maxim Krizhanovsky
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1 Comment
El Yobo
This will also remove any values which evaluate to false, e.g. 0.
To see if anything is present (either a text input, or at least a checkbox value=1) you might use:
strlen(join($_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=).
1 Comment
Gajus
Imploding all the input array can be resource-costly. It can be abused for malicious purposes, esp. if you expose the whole
$_POST array.