php - If a number is too large use an abbreviation

Solution:

First of all, your function:

function convert($num_likes)
{
    $num_likes = $number / 1000;
    return $num_likes . 'k';
}
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will not work as expected, because it converts to the opposite way :) Here is updated version:

function convert($num_likes)
{
    $number = $num_likes / 1000;
    return $number . 'k';
}
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Second point. You should use the function somewhere... for example your line (actually only a part of it):

<p> Total Likes: " . $num_likes ."</p>
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must be:

<p> Total Likes: " . convert($num_likes) ."</p>
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And finally, using this answer we can modifyconvert function to this:

function convert($n) {
    if ($n < 1000) {
        $n_format = number_format($n);
    } else if ($n < 1000000) {
        // Anything less than a million
        $n_format = number_format($n / 1000, 3) . 'k';
    } else if ($n < 1000000000) {
        // Anything less than a billion
        $n_format = number_format($n / 1000000, 3) . 'M';
    } else {
        // At least a billion
        $n_format = number_format($n / 1000000000, 3) . 'B';
    }
    return $n_format;
}
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Now we can convert all numbers up to billions.

Playground: click.

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