为什么在服务器上php里执行file_put_contents创建文件回到是false呢，文件目录已经设置为777的权限了，不解-PHP Tutorial-php.cn

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为什么在服务器上php里执行file_put_contents创建文件回到是false呢，文件目录已经设置为777的权限了，不解

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Jun 13, 2016 am 11:50 AM

centosfilenbspput

为什么在服务器上php里执行file_put_contents创建文件返回是false呢，文件目录已经设置为777的权限了，不解
想用file_get_contents读取网络上的图片文件并由file_put_contesnts写入到服务器本地，file_get_contesnts执行没问题，可以读取信息，然后将读出的数据$data执行:
var_dump(file_put_contents($local_file_position, $data));在测试中会显示var_dump出的信息，但最后file_put_contents返回是false，不知道为什么，在网上搜说是aparche没有写权限，是这样的吗？如果是，如何设置呢？

环境：CentOS 6.5 + MySQL5.5.35 + tomcat7.0.47

------解决方案--------------------
用的是绝对路径还是相对路径？
------解决方案--------------------
先确认file_get_contents（）获取的数据是否存在，数据类型是否合法。
------解决方案--------------------
估计是权限不够
echo substr(sprintf('%o', fileperms('你的目录')), -4); //看看是什么结果
------解决方案--------------------

引用:

绝对路径和相对路径是一样的

要求能写入的话文件所在的目录也是需要有写的权限的
比如 /home/centos/123.txt
目录home、centos也都是需要写的权限的不只是单单123.txt需要写权限
------解决方案--------------------
file_put_contents 失败时会有明确的错误信息输出
请贴出
------解决方案--------------------
提示很清楚了，
Permission denied
拒绝访问
------解决方案--------------------
你是要把文件写到 /usr/local/www/wxtest/txt 目录中
请检查目录存在且可写
------解决方案--------------------
1. 755权限指的是 rwxr-xr-x，同组和其他用户是没有写权限的。 777才是全部用户拥有所有权限。

2. 建议使用绝对路径，写文件前在脚本内判断路径是否存在，不存在则先创建路径（目录）再写文件，这个是血淋淋的教训。
------解决方案--------------------
把/usr/local/www/wxtest/txt设成777
------解决方案--------------------
确定是对组外用户的权限是777？

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