使用include输出页面出现数字1
include.php
echo include 'include_menu.php';
?>
include_menu.php
echo '首页-HTML教程-PHP教程';
?>
运行后出现如下图所示的在末尾有个数字1.请问是什么原因呢？
回复讨论(解决方案)
去掉 include.php 里的 echo
去掉 include.php 里的 echo
十分感谢 echo include 'include_menu.php';
?>
改为
include 'include_menu.php';
?>
因为include_menu.php里面已经有echo
两个 echo 不会报错嘛？
还是说，其中一个输出1 的原因是 include 成功 所以输出 1？
求解
不太懂这个原理，是不是include有返回布尔值，成功引入文件后返回true，然后echo变成1了呢
两个 echo 不会报错嘛？
还是说，其中一个输出1 的原因是 include 成功 所以输出 1？
求解
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