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網上下載了html2pdf-4.5.1.zip，
要運行里面的實例，要先安裝composer
運行html2pdf時，readme里面建議按照composer-setup.exe
安裝過程中出現openssl的問題，在php.ini中開啟相應extension即可，
路徑寫絕對路徑，否則按默認路徑找不到
在html2pdf的文件路徑下，cmd運行composer install
安裝dependencies
D:\software\WebServer\apache\Apache24\htdocs\html2pdf>composer install
Loading composer repositories with package information
Updating dependencies (including require-dev)
- Installing tecnickcom/tcpdf (6.2.12)
Downloading: 100%
Writing lock file
Generating autoload files
D:\software\WebServer\apache\Apache24\htdocs\html2pdf>
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下載的文件目錄概覽
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運行時出現的問題
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修改以上gd extension問題，修改php.ini
extension=D:\software\PhpWin\php56\ext\php_gd2.dll ;extension=php_gettext.dll ;extension=php_gmp.dll ;extension=php_intl.dll ;extension=php_imap.dll ;extension=php_interbase.dll ;extension=php_ldap.dll ;extension=php_mbstring.dll ;extension=php_exif.dll ; Must be after mbstring as it depends on it ;extension=php_mysql.dll ;extension=php_mysqli.dll ;extension=php_oci8_12c.dll ; Use with Oracle Database 12c Instant Client extension=D:\software\PhpWin\php56\ext\php_openssl.dll //這是安裝composer時出現錯誤要改的
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至此，運行成功
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