在PHP中将嵌套的CSS数组转换为字符串

function cssArrayToString($cssArray) {
    $cssString = '';
    foreach ($cssArray as $key => $value) {
        if (is_array($value)) {
            $nestedCss = cssArrayToString($value);
            $cssString .= "{$key} { {$nestedCss} } ";
        } else {
            $cssString .= "{$key}: {$value}; ";
        }
    }
    return $cssString;
}

$nestedCssArray = array(
    'body' => array(
        'font-family' => 'Arial, sans-serif',
        'background-color' => '#f0f0f0',
        'margin' => '0',
        'padding' => '0'
    ),
    'header' => array(
        'background-color' => '#ffffff',
        'padding' => '10px'
    ),
    'h1' => array(
        'color' => '#333333',
        'font-size' => '24px'
    )
);

$cssString = cssArrayToString($nestedCssArray);
echo $cssString;

body { font-family: Arial, sans-serif; background-color: #f0f0f0; margin: 0; padding: 0; } header { background-color: #ffffff; padding: 10px; } h1 { color: #333333; font-size: 24px; }