<?php
echo "<script language=\"JavaScript\">alert(\"你好\");</script>"; ?> 或者 <?php print "<script language=\"JavaScript\">alert(\"你好\");</script>"; ?> 2. 如果需要php弹出对话框之后返回原来页面可以这么写 <?php echo "<script language=\"JavaScript\">\r\n"; echo " alert(\"你好\");\r\n"; echo " history.back();\r\n"; echo "</script>"; exit; ?> 或者 <?php print "<script language=\"JavaScript\">\r\n"; print " alert(\"你好\");\r\n"; print " history.back();\r\n"; print "</script>"; exit; ?>