What is the issue with sorting article numbers in PHP when using VARCHAR data type?

When sorting article numbers stored as VARCHAR in PHP, the sorting may not work as expected because VARCHAR sorting is based on string comparison rather than numerical comparison. To solve this issue, you can cast the VARCHAR column to a numerical type (e.g., INT) before sorting. 

// Assuming $articles is an array of article numbers stored as VARCHAR
// Cast the article numbers to INT before sorting
usort($articles, function($a, $b) {
    return (int)$a - (int)$b;
});

// Now $articles will be sorted numerically

Keywords

PHP sorting article numbers VARCHAR data type

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