php检测文件编码方法,
php检测文件编码方法,
关于文件编码的检测,百度一下一大把都是,但是确实没有能用的、
很多人建议 mb_detect_encoding 检测,可是不知为何我这不成功,什么都没输出、
看到有人写了个增强版,用 BOM 判断的,我果断就无视了,这东西完全不靠谱、
最终根据PHP手册里 mb_detect_encoding 函数下方的例子,自己写了一个检测函数,
还包括自动检测编码并按指点编码读取文件的函数、
源码献上,不喜勿喷。
网上的方法我试过没用才写的,说不定环境不一样导致的。
所以万一没用,也别喷我,我只是共享想思路而已、、
<span class="hljs-preprocessor"><?php <span class="hljs-comment">/** * 检测文件编码 *<span class="hljs-phpdoc"> @param string $file 文件路径 *<span class="hljs-phpdoc"> @return string|null 返回 编码名 或 null */ <span class="hljs-function"><span class="hljs-keyword">function <span class="hljs-title">detect_encoding<span class="hljs-params">(<span class="hljs-variable">$file) { <span class="hljs-variable">$list = <span class="hljs-keyword">array(<span class="hljs-string">'GBK', <span class="hljs-string">'UTF-8', <span class="hljs-string">'UTF-16LE', <span class="hljs-string">'UTF-16BE', <span class="hljs-string">'ISO-8859-1'); <span class="hljs-variable">$str = file_get_contents(<span class="hljs-variable">$file); <span class="hljs-keyword">foreach (<span class="hljs-variable">$list <span class="hljs-keyword">as <span class="hljs-variable">$item) { <span class="hljs-variable">$tmp = mb_convert_encoding(<span class="hljs-variable">$str, <span class="hljs-variable">$item, <span class="hljs-variable">$item); <span class="hljs-keyword">if (md5(<span class="hljs-variable">$tmp) == md5(<span class="hljs-variable">$str)) { <span class="hljs-keyword">return <span class="hljs-variable">$item; } } <span class="hljs-keyword">return <span class="hljs-keyword">null; } <span class="hljs-comment">/** * 自动解析编码读入文件 *<span class="hljs-phpdoc"> @param string $file 文件路径 *<span class="hljs-phpdoc"> @param string $charset 读取编码 *<span class="hljs-phpdoc"> @return string 返回读取内容 */ <span class="hljs-function"><span class="hljs-keyword">function <span class="hljs-title">auto_read<span class="hljs-params">(<span class="hljs-variable">$file, <span class="hljs-variable">$charset=<span class="hljs-string">'UTF-8') { <span class="hljs-variable">$list = <span class="hljs-keyword">array(<span class="hljs-string">'GBK', <span class="hljs-string">'UTF-8', <span class="hljs-string">'UTF-16LE', <span class="hljs-string">'UTF-16BE', <span class="hljs-string">'ISO-8859-1'); <span class="hljs-variable">$str = file_get_contents(<span class="hljs-variable">$file); <span class="hljs-keyword">foreach (<span class="hljs-variable">$list <span class="hljs-keyword">as <span class="hljs-variable">$item) { <span class="hljs-variable">$tmp = mb_convert_encoding(<span class="hljs-variable">$str, <span class="hljs-variable">$item, <span class="hljs-variable">$item); <span class="hljs-keyword">if (md5(<span class="hljs-variable">$tmp) == md5(<span class="hljs-variable">$str)) { <span class="hljs-keyword">return mb_convert_encoding(<span class="hljs-variable">$str, <span class="hljs-variable">$charset, <span class="hljs-variable">$item); } } <span class="hljs-keyword">return <span class="hljs-string">""; }</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>

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