个人学习笔记核心源码如下：/** * 打印 * @param array …$params * @author klinson <klinson@163.com> /function info(…$params){ foreach ($params as $param) { info_item($param); }}/* * 打印单个变量 * @param $param * @param int $i * @author klinson <klinson@163.com> /function info_item($param, $i = 0){ switch (gettype($param)) { case ‘array’: info_array($param, $i); break; case ‘object’: info_object($param, $i); break; case ‘boolean’: echo “bool(”.($param ? “true” : “false”).")"; break; case ‘integer’: echo “int({$param})”; break; case ‘string’: echo “string({$param})”; break; case ‘double’: echo “float({$param})”; break; case ’null’: echo ’null’; break; case ‘resource’: echo ‘resource’; break; default: echo ‘UNKNOWN TYPE’; break; } echo PHP_EOL;}/* * 打印数组 * @param $param * @param int $i * @author klinson <klinson@163.com> /function info_array($param, $i = 0){ // 前置空格 $space = ‘’; $num = $i; while ($num) { $space .= ’ ‘; $num–; } echo ‘array[’.count($param).’]: {’.PHP_EOL; foreach ($param as $key => $item) { echo $space." [{$key}] => “; info_item($item, $i+1); } echo $space.’}’;}/* * 打印对象 * @param $param * @param int $i * @author klinson <klinson@163.com> */function info_object($param, $i = 0){ // 前置空格 $space = ‘’; $num = $i; while ($num) { $space .= ’ ‘; $num–; } echo ‘object(’.get_class($param).’[’.count($param).’]): {’.PHP_EOL; foreach ($param as $key => $item) { echo $space.” [{$key}] => “; info_item($item, $i+1); } echo $space.’}’;}测试代码：$a = 1.11;$b = ‘a’;$c = [$a, $b];$d = new stdClass();$d->aaa = ‘aaa’;$d->bb = $c;info($a, $b, $c, $d);效果如下: