PHP If statement comparing an text input with a 2D array? - php

Question

I need to make a task where it compares an array value with an inputted text value.
For the array, the code is this:
<div class="wpsc-quantity-discounts">
<table>
<thead>
<tr>
<th class="qty" colspan="2">Quantity:</th>
<th class="curr"><span class="hidden">Currency:<span></th>
<th class="price">Price:</th>
</tr>
</thead>
<tbody>
<tr>
<td class="remove"></td>
<td class="qty">
<input type="text" size="5" value="500"/*this value*/ name="table_rate_price[quantity][]" />
+ </td>
<td class="curr">USD $</td>
<td><input class="newCurrPrice text" value="0.48" name="table_rate_price[table_price][]" /></td>
It already contains the variables I need. I need to compare the first column with an inputted text from my single product page.
<?php if(wpsc_has_multi_adding()): ?>
<fieldset><legend style="float:left;"><?php _e('Quantity', 'wpsc'); ?>: </legend>
<div class="wpsc_quantity_update">
<input type="text" id="wpsc_quantity_update_<?php echo wpsc_the_product_id(); ?>" name="wpsc_quantity_update" size="2" value="500"/*This value*/ />
<input type="hidden" name="key" value="<?php echo wpsc_the_cart_item_key(); ?>"/>
<input type="hidden" name="wpsc_update_quantity" value="true" />
</div><!--close wpsc_quantity_update-->
</fieldset>
I need to make an if statement where if the inputted text is less than the first column's array, it will return false. If anybody has a suggestion that'd be awesome. I'm still kind of a noob in php so be easy :p. Thanks.
This is the code that I have now.
<fieldset><legend style="float:left;"><?php _e('Quantity', 'wpsc'); ?>: </legend>
<div class="wpsc_quantity_update">
<input type="text" id="wpsc_quantity_update_<?php echo wpsc_the_product_id(); ?>" name="wpsc_quantity_update" size="2" value="500" />
<input type="hidden" name="key" value="<?php echo wpsc_the_cart_item_key(); ?>"/>
</div><!--close wpsc_quantity_update-->
<php? if ( table_rate_price[1][0] > wpsc_quantity_update(value)): />
<return <input type="hidden" name="wpsc_update_quantity" value="false" />
<?php else: ?>\
return <input type="hidden" name="wpsc_update_quantity" value="true" />;
</fieldset>

Answer 1

Check documentation for in_array I believe that's what you are looking for.
Here is a snippet to get you started:
<?php
$os = array("Mac", "NT", "Irix", "Linux");
if (in_array("Irix", $os)) {
echo "Got Irix";
}
if (in_array("mac", $os)) {
echo "Got mac";
}
?>

Answer 2

Looks like table_rate_price[1][] should be table_rate_price[1][0]? Can't tell without seeing how that array looks, do a print_r($table_rate_price) and show us the results.
I would cast value to an int or float before the comparison since all post data will be String. I'm assuming wpsc_quantity_update() returns the $_POST['wpsc_quantity_update'] value.
floatval() * decimals like 0.48, 3.14, ...
intval * whole numbers 1, 2, 3 ...
if ( table_rate_price[1][0] < floatval(wpsc_quantity_update())) {
return false;
}
return true;