Question

I have this <input type="text" name="Fax" id="faxbox" maxlength="9" value="<?php echo $row['Fax'] ?>" />

I want to leave it blank on submit. On Data Base, that column (as int) is set to allow nulls too.

But when i submit, my empty/blank field is turn to 0 (zero) by MySql. I want that appear NULL instead 0.

What should I do? I try if(empty($_POST['Fax'])){$Fax=NULL;} but wont work.

Answer 1

In order to insert NULL value in MySQL using php, you need to do it like this:

INSERT INTO table (field,field2) VALUES (NULL,3)

in your case, try this:

$Fax = !empty($Fax) ? "'$Fax'" : "NULL"; 
INSERT INTO tableName (Fax) VALUES ($Fax);

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