How to get file extension via PHP
This article mainly introduces how to obtain the file extension through PHP, which has certain reference value. Now I share it with everyone. Friends in need can refer to it
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##The first type
substr(strrchr("http://www.xxx.com/public/abc.jpg", '.'), 1);
string strrchr('string','needle') 获取字符串中出现指定字符串的最后位置到末尾的内容
int strrpos('string','needle') 获取字符串中出现指定字符串的最后位置
string substr('string','position') 从指定位置截取字符串到末尾
string strchr('string','needle') 获取字符串中出现指定字符串的最先位置到末尾的内容
int strpos('string','needle') 获取字符串中出现指定字符串的最先位置The second type
substr($path, strrpos($path, '.') + 1)
The third type
array_pop(explode('.', $path))
The fourth type
(pathinfo($path))['extension'] pathinfo($path) 返回： 'dirname' => string 'http://www.baidu.com/public' (length=27) 'basename' => string 'abc.jpg' (length=7) 'extension' => string 'jpg' (length=3) 'filename' => string 'abc' (length=3)
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