How to create if dynamically in php

Question

I want to create an if statement dynamically in PHP, but I don't know how to do this. For example, I am creating an Excel with different heights, widths and prices.

If my valueWidth < width the price is equal to the width price above.

If my width = 2050 and height = 2560, the prices is 621$.

The width, height and prices is entered dynamically and can be different from 3 numbers. Width, height and prices is Array.

width = [2000,3025,4036]
height = [2214,2411,2608]
class_1 = [245,272,302]
class_2 = [537,584,621]
class_3 = [755,799,836]
class_X = [...]

Can you help me find how to do the conditions effectively, please ?

I try to do with If condition but it's not dynamically, if I add other values — rmarquet21
– rmarquet21, Commented Nov 14, 2020 at 17:07
Do you want extract the numbers from the characters? Or Do you want get a list of values (height & width) as an array?? — FarZan Takhsha
– FarZan Takhsha, Commented Nov 14, 2020 at 17:22

Tim Morton · Accepted Answer · 2020-11-14 17:52:31Z

You may be aware of associative arrays, where you have a named key and a value:

$data = array('keyName' => 'value');
print $data['keyName']; 
// ==> 'value'

But for a grid, you need two indexes:

$grid = array(
  'rowName' => array(
    'colName' => 'rowColValue'
  )
);
print $grid['rowName']['colName'];
// == 'rowColValue'

So to condense all your data into one place, it would look like this:

$grid['2000']['2214'] = 245;
$grid['2000']['2411'] = 272;
$grid['2000']['2680'] = 302;
$grid['3025']['2214'] = 537;
$grid['3025']['2411'] = 584;
$grid['3025']['2086'] = 621;
$grid['4036']['2214'] = 755;
$grid['4036']['2411'] = 799;
$grid['4036']['2680'] = 836;

$width = '3025';
$height = '2411';

print $grid[$width][$height];

//==> 584

Assignment is just as easy as getting the results:

// assume $width. $height, and $price are user input, properly validated
$grid[$width][$height] = $price;

Alternately, if you need to build this from the arrays you supplied:

width = [2000,3025,4036]
height = [2214,2411,2608]
class_1 = [245,272,302]
class_2 = [537,584,621]
class_3 = [755,799,836]
class_X = [...]

Build a nested loop something like this:

$prices = [];
$prices[] = $class_1;
$prices[] = $class_2;
$prices[] = $class_3;
// etc.

$grid = [];
$classNumber = 0;
foreach($width as $w) {
  foreach($height as $h) {
    $grid[$w][$h] = $prices[$classNumber];
  }
  $classNumber++;
}

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