string mime_content_type ( string $filename )
Returns the MIME content type for a file as determined by using information from the magic.mime file.
<?php
$mime_type = mime_content_type('1.jpg');
echo $mime_type; // image/jpeg
?>fileinfo? ????? php_fileinfo ?? ????? ???? ???.
???? ??? Extension_dir ?????? php_fileinfo.dll(windows), fileinfo.so(linux)? ?? ? ????.
php.ini? ?? Extension=php_fileinfo.dll ?? ";"? ??? ?? ?? ?????. ???.
exif_imagetype ???? ????? php_exif ???? php_mbstring ???? ???? ???.
????? Extension_dir ????? php_exif.dll(windows), exif.so(linux)? ?? ? ????.
php.ini? ?? ???=php_mbstring? ?????. .dll ?? ","? ???? ???=php_exif.dll? ?? ?? ???? ?? ??????? masterMIME?? ??? PHP ????????. ??? ??? ?? ????? ? ????.
? ???? ?? ???? ???? ????? ?? ???? ????? ????????. ?????? ???? ?? ??????! ? ???? ?? ???? ?? ?????? ?????. ??? ???? ???? ??? ????. ??? ??? ?? ??? ?? ??? ???? ????! ??? ?? ?? ??? ???? ????? ????. ???: admin@php.cn
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29 Jul 2016
??? ?? ??? ?? ?? ?????: ??? ?? ??? ?? ?? ????? ??? ?? ????(1): ? ??? ?????? ???? ??? ??? ??: # ------ --- --------------------- # # ??? ??? ?? 'author' # CREATE TABLE ??? ( author_id int (6) DEFAULT '0' NOT NULL auto_increment, first_name varchar(20)
php ?? php ?? ?? ? ????
29 Jul 2016
php ??: php ?? php ?? ?? ? ????: ??? ?? ??? ?????. <?php session_start() $_SESSION['username']="zhuzhao" ?> ??? ?? ??? ?????. <?php session_start() ; unset ($_SESSION['username']); if(isset($_SESSION['username'])) echo "??? ??? ?? ?????.";
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