php 中 fopen()打开文件(Url)失败是什么原因?

php 中 fopen()打开文件(Url)失败是什么原因?
2025-03-24 09:44:54
推荐回答(5个)
回答1:

需要在php.ini中将相关配置开启

fopen原型:

resource fopen ( string $filename , string $mode [, bool $use_include_path = false [, resource $context ]] )

如果PHP认为filename指定的是一个已注册的协议,而该协议被注册为一个网络URL,PHP将检查并确认allow_url_fopen已被激活。如果关闭了,PHP将发出一个警告,而fopen的调用则失败。

allow_url_fopen:本选项激活了URL形式的fopen封装协议使得可以访问URL对象例如文件。默认的封装协议提供用ftp和http协议来访问远程文件,一些扩展库例如zlib可能会注册更多的封装协议。

注意:

  1. 出于安全性考虑,此选项只能在php.ini中设置。

  2. 此选项是紧接着版本4.0.3发布后引进的。版本4.0.3以及之前的版本只能在编译时通过配置项--disable-url-fopen-wrapper来取消此特性。

回答2:

手动验证URL地址是否存在。然后打开PHP的错误提示信息。看看他提示什么原因
再者查看下你的PHP.INI配置是否打开了fopen功能。如果功能未开启。或则被禁用的话。就不可能成功

回答3:

你可以试试file_get_contents,或者用curl

回答4:

fopen是打开本地文件的

回答5:

文件不存在

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