站長資訊網下面由Laravel教程欄目給大家介紹如何使用Laravel-snappy導出PDF，希望對需要的朋友有所幫助！
前言
論壇里有很多關于如何使用 Laravel-snappy 的文章，但是很多都停留在安裝、基本示例，對于實際的應用既沒有說明用法，也沒有解答一些問題和疑惑，因此在此整理一下，權當做個記錄吧。
安裝
以 ubuntu 為例
1. 執行安裝 wkhtmltopdf：
composer require h4cc/wkhtmltopdf-amd64 0.12.x composer require h4cc/wkhtmltoimage-amd64 0.12.x
顧名思義，分別安裝的是 wkhtmltopdf 和 wkhtmltoimage。
2. 復制 wkhtmltopdf 到 ubuntu 可執行命令的目錄中
sudo cp vendor/h4cc/wkhtmltoimage-amd64/bin/wkhtmltoimage-amd64 /usr/local/bin/ sudo cp vendor/h4cc/wkhtmltopdf-amd64/bin/wkhtmltopdf-amd64 /usr/local/bin/ //并使其可執行： sudo chmod +x /usr/local/bin/wkhtmltoimage-amd64 sudo chmod +x /usr/local/bin/wkhtmltopdf-amd64
3. 安裝 laravel-snappy
composer require barryvdh/laravel-snappy
4. 將 ServiceProvider 添加到 config/app.php 中的 providers 數組中
BarryvdhSnappyServiceProvider::class
5. 將 Facades 添加到 config/app.php 中的 aliases 數組中
'PDF' => BarryvdhSnappyFacadesSnappyPdf::class, 'SnappyImage' => BarryvdhSnappyFacadesSnappyImage::class,
6. 執行生成配置文件
php artisan vendor:publish --provider="BarryvdhSnappyServiceProvider"
可以看到默認的配置文件為 config/snappy.php：
return [ 'pdf' => [ 'enabled' => true, 'binary' => env('WKHTML_PDF_BINARY', '/usr/local/bin/wkhtmltopdf'), 'timeout' => false, 'options' => [], 'env' => [], ], 'image' => [ 'enabled' => true, 'binary' => env('WKHTML_IMG_BINARY', '/usr/local/bin/wkhtmltoimage'), 'timeout' => false, 'options' => [], 'env' => [], ], ];
注意，這里有個坑，默認 binary 配置為 /usr/local/bin/wkhtmltopdf 和 /usr/local/bin/wkhtmltoimage，在第一次使用的時候，會報錯 /usr/local/bin/wkhtmltopdf不存在，這是因為在 linux 系統下，wkhtmltopdf 和 wkhtmltoimage 的真實路徑和名稱為：/usr/local/bin/wkhtmltopdf-amd64 和 /usr/local/bin/wkhtmltoimage-amd64。
因此，需要把配置信息修改為：
'pdf' => [ ... 'binary' => env('WKHTML_PDF_BINARY', '/usr/local/bin/wkhtmltopdf-amd64'), ... ], 'image' => [ ... 'binary' => env('WKHTML_IMG_BINARY', '/usr/local/bin/wkhtmltoimage-amd64'), ... ],
開始使用
//使用方法1 $pdf = PDF::loadView('welcome', $data); return $pdf->download('welcome.pdf'); //使用方法2 $html = '<html><head><meta charset="utf-8"></head><h1>訂單id</h1><h2>12346546</h2></html>'; $pdf = PDF::loadHTML($html); return $pdf->inline();
很多博客里沒有提到，使用方法 1 中，會報這樣的錯：
The exit status code '1' says something went wrong: stderr: "Loading pages (1/6) [> ] 0% [======> ] 10% QSslSocket: cannot resolve CRYPTO_num_locks QSslSocket: cannot resolve CRYPTO_set_id_callback QSslSocket: cannot resolve CRYPTO_set_locking_callback QSslSocket: cannot resolve sk_free QSslSocket: cannot resolve sk_num QSslSocket: cannot resolve sk_pop_free QSslSocket: cannot resolve sk_value QSslSocket: cannot resolve SSL_library_init QSslSocket: cannot resolve SSL_load_error_strings QSslSocket: cannot resolve SSLv3_client_method QSslSocket: cannot resolve SSLv23_client_method QSslSocket: cannot resolve SSLv3_server_method QSslSocket: cannot resolve SSLv23_server_method QSslSocket: cannot resolve X509_STORE_CTX_get_chain QSslSocket: cannot resolve OPENSSL_add_all_algorithms_noconf QSslSocket: cannot resolve OPENSSL_add_all_algorithms_conf QSslSocket: cannot resolve SSLeay QSslSocket: cannot call unresolved function CRYPTO_num_locks QSslSocket: cannot call unresolved function CRYPTO_set_id_callback QSslSocket: cannot call unresolved function CRYPTO_set_locking_callback QSslSocket: cannot call unresolved function SSL_library_init QSslSocket: cannot call unresolved function SSLv23_client_method QSslSocket: cannot call unresolved function sk_num [==================> ] 31% QSslSocket: cannot call unresolved function SSLv23_client_method QSslSocket: cannot call unresolved function SSL_library_init [============================================================] 100% Counting pages (2/6) [============================================================] Object 1 of 1 Resolving links (4/6) [============================================================] Object 1 of 1 Loading headers and footers (5/6) Printing pages (6/6) [> ] Preparing [============================================================] Page 1 of 1 Done Exit with code 1 due to network error: UnknownNetworkError QSslSocket: cannot call unresolved function CRYPTO_num_locks QSslSocket: cannot call unresolved function CRYPTO_set_id_callback QSslSocket: cannot call unresolved function CRYPTO_set_locking_callback " stdout: "" command: /usr/local/bin/wkhtmltopdf-amd64 --lowquality '/tmp/knp_snappy612c3edcdfc855.21787864.html' '/tmp/knp_snappy612c3edcdfce49.80482557.pdf'.
執行：
sudo apt-get update sudo apt install libssl1.0-dev
修復完成，導出 welcome 頁面。
如果使用 save () 方法保存，默認保存到 /public 文件夾下，并且如果文件名相同的情況下，第二次保存會提示文件已經存在。
