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Home Backend Development PHP Tutorial 使用include输出页面出现数字1

使用include输出页面出现数字1

Jun 20, 2016 pm 12:34 PM

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

  你的楼下的解释可能会解答你的问题
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