query: undefined value when checkbox is unchecked php
positive_passages.docid: 2005
positive_passages.text: "Notice: Undefined variable", "Notice: Undefined index", and "Notice: Undefined offset" using PHP
negative_passages.docid: 28020
negative_passages.text: Error checking an inputed value
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negative_passages.text: How to remember whether box is checked or unchecked (on click) with localstorage and also save a value?
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negative_passages.text: Looping through Checkboxes using Javascript
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negative_passages.text: Getting checkbox values on submit
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negative_passages.text: How to pass the value 'undefined' to a function with multiple parameters?
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negative_passages.text: How do i disable a submit button when checkbox is uncheck?
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negative_passages.text: nested checkbox behavior check/uncheck
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negative_passages.text: Conditionally make inputs required depending on checkbox value
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negative_passages.text: Removing a value from a PHP Array
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negative_passages.text: PHP if not equal(!=) and or (||) issue. Why doesnt this work?
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negative_passages.text: Undefined index in PHP post