PHP获取脚本标记之间的值

$script = '<?php $value = "Hello World"; ?>';
preg_match('/<\?php\s+(.*?)\s+\?>/s', $script, $matches);
$value = $matches[1];
echo $value; // 输出 "Hello World"

$script = '<?php $value = "Hello World"; ?>';
$tokens = token_get_all($script);
$inScript = false;
$value = '';

foreach ($tokens as $token) {
    if (is_array($token)) {
        if ($token[0] == T_OPEN_TAG) {
            $inScript = true;
        } elseif ($token[0] == T_CLOSE_TAG) {
            $inScript = false;
        } elseif ($inScript) {
            $value .= $token[1];
        }
    } else {
        if ($inScript) {
            $value .= $token;
        }
    }
}

echo $value; // 输出 " $value = "Hello World"; "