Create group of number ranges between two static numbers

I want to make a simple algorithm in PHP that has as scope to generate automatically group of numbers between a range.

Let me be more clear to you. I have a price filter section for an e-shop collection page. What I do is I'm grabbing the minimum and the maximum price from the database of products, then I would like to create groups of those numbers .

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Let's suppose that the minimum price of a product is 50 dollars and the maximum one is 300 dollars. What I would like to do is something like this:

Choose price range:

[checkbox here] 50 - 100

[checkbox here] 101 - 150

[checkbox here] 151 - 200

[checkbox here] 201 - 250

[checkbox here] 251 +

So at the end to grab automatically the min and max value and create automatically groups.

I started something like this, but I'm stuck:

for ( $x = $minPrice; $x < $maxPrice; $x++ ) { 

    if ( $x % 50 == 0 ) {

        echo $x;

    }

}

Thank you in advance!

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以下是我能够理解您期望的代码：

$range = "";
for($i = 0; $i <= 300; $i += 50) {
    $range = $i<250 ?  ($i.'-'.($i+50)) : "250+";
    echo '<input type="checkbox" value="'.$i.'">Range '.$range.'<br>'; 
}

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