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HomeBackend DevelopmentPHP TutorialPHP fopen 读取带中文URL地址的一点见解_PHP

但昨天在读取一张图片的时候出问题了,后来发现是URL里带中文字符。

例如下面这种情况:
复制代码 代码如下:
$files = fopen('http://www.website.com/我的PP.jpg', 'rb');

那“$files”的返回值将会是“False”。首先我想到的是将URL用urlencode编码一下,发现还是不行,原来urlencode会把“:”、“/”字符也编码了,那URL就不是URL了。呵,说得有些绕口,那就把“:”、“/”字符的编码替换回来就应该行的。
复制代码 代码如下:
$url = 'http://www.website.com/我的PP.jpg';
$url = preg_replace('/\%3A/i', ':', preg_replace('/\%2F/i', '/', urlencode(urldecode($url)))); $file = fopen($url, 'rb');


试试,嘿~还真是行了。下面再温习一下fopen()函数:

fopen() 函数打开文件或者URL。 如果打开失败,本函数返回FALSE。 打开成功,本函数返回TRUE。

一、语法:

复制代码 代码如下:fopen(filename, mode, include_path, context)

参数 描述
filename 规定要打开的文件或 URL。
mode 规定要求到该文件/流的访问类型。可能的值见下表。
include_path 如果也需要在 include_path 中检索文件的话,可以将该参数设为 1 或 TRUE。
context 规定文件句柄的环境。Context 是可以修改流的行为的一套选项。

二、mode 参数的可能的值:

mode 说明
"r" 只读方式打开,将文件指针指向文件头。
"r+" 读写方式打开,将文件指针指向文件头。
"w" 写入方式打开,将文件指针指向文件头并将文件大小截为零。如果文件不存在则尝试创建之。
"w+" 读写方式打开,将文件指针指向文件头并将文件大小截为零。如果文件不存在则尝试创建之。
"a" 写入方式打开,将文件指针指向文件末尾。如果文件不存在则尝试创建之。
"a+" 读写方式打开,将文件指针指向文件末尾。如果文件不存在则尝试创建之。
"x" 创建并以写入方式打开,将文件指针指向文件头。如果文件已存在,则 fopen() 调用失败并返回 FALSE,并生成一条 E_WARNING 级别的错误信息。如果文件不存在则尝试创建之。
这和给底层的 open(2) 系统调用指定 O_EXCL|O_CREAT 标记是等价的。
此选项被 PHP 4.3.2 以及以后的版本所支持,仅能用于本地文件。
"x+" 创建并以读写方式打开,将文件指针指向文件头。如果文件已存在,则 fopen() 调用失败并返回 FALSE,并生成一条 E_WARNING 级别的错误信息。如果文件不存在则尝试创建之。
这和给底层的 open(2) 系统调用指定 O_EXCL|O_CREAT 标记是等价的。
此选项被 PHP 4.3.2 以及以后的版本所支持,仅能用于本地文件。
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