Question

I am creating a query that depends on several input form values, and at some point I am working on three values. The first value queried has to be always 0, so I have this:

.. AND value_1 = 0

What I want to be able to do cleanly is the following:

If checkbox_2 is checked:

... AND (value_1 = 0 OR value_2 = 0)

If checkbox_3 is checked

... AND (value_1 = 0 OR value_3 = 0)

If checkbox_2 and checkbox_3 are checked

... AND (value_1 = 0 OR value_2 = 0 OR value_3 = 0)

I am creating the SQL query in a string, and I am wondering what would be a clean way to do this.

Answer 1

The cleanest way is to create an array filled with the options used in your SQL query and either implode the string together.

<?php

$options = array();
$options[] = 'value_1';
$options[] = 'value_2';

// add our condition to each column
array_walk($options, function(&$v) {
    $v = sprintf('%s = 0', $v);
});

// implode into SQL
$sql = sprintf('... AND (%s)', implode(' OR ', $options));

Just make sure you hook up your check-boxes to the $options array.