Php check folder exists and create

if (!file_exists('path/to/directory')) {
    mkdir('path/to/directory', 0777, true);
}

Php check if folder exists

<?php
$filename = '/path/to/foo.txt';

if (file_exists($filename)) {
    echo "The file $filename exists";
} else {
    echo "The file $filename does not exist";
}
?>

Source: php.net

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