php string no concat add expressions code example

Example 1: how to add two string in php

Remember dot .

Example 2: how to increment a number after concatinating it with a date function in php

function generateId($existingIds) {
    $currentDate = date('Ymd');

    $id = 1;

    while (in_array($currentDate . sprintf('%02d', $id),$existingIds)) {
        $id++;
    }

    return $currentDate . sprintf('%02d', $id);
}

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