php - error in SQL syntax with html checkbox value -

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surely stupid issue, can not find error.

from form value of checkbox (0 or 1), query generates error. "you have error in sql syntax; check manual corresponds mysql server version right syntax use near 'check)"

<form action="processcategory.php?action=add" method="post" enctype="multipart/form-data" name="frmcategory" id="frmcategory">   <input type="hidden" name="check" value="0" />   <input type="checkbox" name="check" value="1" /> </form>

php

 $checkboxvalue = (isset($_post['check'])) ? intval($_post['check']) : 0; // returns 0 or 1   $sql   = "insert tbl_category (cat_parent_id, cat_name, cat_description, check)            values ($parentid, '$name', '$description', $checkboxvalue)"; $result = dbquery($sql) or die('cannot add category' . mysql_error());

mysql field: check 

`check` tinyint(1) not null

check reserved word , using inside query 1 of column.

list of reserved words

you need use backticks ` escape reserved words in mysql:

insert tbl_category (cat_parent_id, cat_name, cat_description, `check`)

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