PHP echo $ _SERVER ['PHP_SELF']与添加的变量？

Question

只是想$_SERVER['PHP_SELF']作为附加了？logout = 1的链接。

<a href="<?php echo ''$_SERVER['PHP_SELF']'.logout=1' ?>" id="add"><input type="button" value="LOGOUT" /></a>

给

Parse error: syntax error, unexpected T_VARIABLE, expecting ',' or ';' in F:\export\srv\www\vhosts\main\htdocs\php\assign3\m_a2_functions.php on line 90

Answer 1

更改：

<?php echo ''$_SERVER['PHP_SELF']'.logout=1' ?>

至：

<?php echo $_SERVER['PHP_SELF'], '?logout=1' ?>