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安装composer

运行html2pdf时，readme里面建议按照composer-setup.exe

安装过程中出现openssl的问题，在php.ini中开启相应extension即可，

路径写绝对路径，否则按默认路径找不到

在html2pdf的文件路径下，cmd运行composer install

安装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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运行时出现的问题

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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 //这是安装composer时出现错误要改的

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原文：http://www.cnblogs.com/qingmaple/p/6069004.html