Troubleshooting of PHP errors: Difference between revisions

Jump to navigation Jump to search

Troubleshooting of PHP errors (edit)

Revision as of 22:59, 15 May 2024

4,671 bytes removed ,  15 May 2024
→‎File and Directory Issues
Line 160: Line 160:
* 解法I: 如果沒有設定 composer.phar 的 PATH ，需要清楚告知 composer.phar 的完整檔案路徑，例如{{kbd | key = /path/to/php /path/to/composer require league/csv}}
* 解法I: 如果沒有設定 composer.phar 的 PATH ，需要清楚告知 composer.phar 的完整檔案路徑，例如{{kbd | key = /path/to/php /path/to/composer require league/csv}}
* 解法II on {{Mac}}/{{Linux}}:  將下載的 composer.phar 移動到 /usr/local/bin/composer {{kbd | key = mv /path/to/composer.phar /usr/local/bin/composer}}，再重新執行安裝套件的指令<ref>[http://stackoverflow.com/questions/21670709/running-composer-returns-could-not-open-input-file-composer-phar php - Running Composer returns: "Could not open input file: composer.phar" - Stack Overflow]</ref>。
* 解法II on {{Mac}}/{{Linux}}:  將下載的 composer.phar 移動到 /usr/local/bin/composer {{kbd | key = mv /path/to/composer.phar /usr/local/bin/composer}}，再重新執行安裝套件的指令<ref>[http://stackoverflow.com/questions/21670709/running-composer-returns-could-not-open-input-file-composer-phar php - Running Composer returns: "Could not open input file: composer.phar" - Stack Overflow]</ref>。
== File and Directory Issues ==
=== 檔案操作有關 ===
可否讀取或寫入：例如 imagejpeg($canvas, $filename, 100); 沒有顯示錯誤訊息，則需要
* 檢查檔案或目錄是否存在 [http://tw2.php.net/file_exists file_exists]
* 檢查檔案是否可以讀取 [http://php.net/manual/en/function.is-readable.php is_readable]
* 如果是上傳檔案，需要檢查暫存目錄是否可以寫入 [http://stackoverflow.com/questions/1520956/php-way-to-find-the-web-servers-temp-path upload - PHP way to find the web server's temp path? - Stack Overflow]
* 檢查該檔案所在目錄是否已經建立，若未建立則需要建立 [http://php.net/manual/en/function.mkdir.php mkdir]，並設定可以寫入。如果產生位置是在多層子目錄下 (巢狀的多層目錄)，則需要啟用 recursive 選項<ref>[http://stackoverflow.com/questions/2303372/create-a-folder-if-it-doesnt-already-exist php - Create a folder if it doesn't already exist - Stack Overflow]  code snippet: <nowiki>mkdir('path/to/directory', 0755, true);</nowiki> </ref>
* 設定該檔案/目錄是否可以寫入: 如果要刪除或寫入檔案，需要檢查是否具備寫入權限
*# SELinux (Security-Enhanced Linux) policy: {{kbd | key = httpd_sys_rw_content_t}}<ref>[https://blog.lysender.com/2015/07/centos-7-selinux-php-apache-cannot-writeaccess-file-no-matter-what/ CentOS 7 + SELinux + PHP + Apache – cannot write/access file no matter what | Lysender's Daily Log Book]</ref>
*# (optional) 該檔案/目錄的 (1) 擁有者是網站使用者 (e.g. 網站伺服器設定檔預設值 CentOS 的 Apache 伺服器是 apache、Ubuntu 的 Apache 伺服器則是 www-data<ref>[https://ubuntuforums.org/showthread.php?t=1293508 [SOLVED] How to find out Apache Username?]</ref>) 、或者是 (2) 網站使用者的群組 (e.g. CentOS 的 Apache 伺服器是 apache、Nginx 伺服器是 nginx) 可以寫入
*# {{Win}} [http://www.webdeveloper.com/forum/showthread.php?165933-File-Permissions-in-Windows-(WAMP) File Permissions in Windows (WAMP)] <ref>[https://technet.microsoft.com/en-us/library/Cc754344.aspx Set, View, Change, or Remove Permissions on Files and Folders]</ref>
* 驗證是否具備寫入權限:
*# 輸入 {{Linux}} 指令 (1) 檢查檔案權限 {{kbd | key = ls -Z /path/to/file}}、(2) 檢查目錄權限 {{kbd | key = ls -Zd /path/to/directory/}}
*# PHP [https://www.php.net/manual/en/function.get-current-user.php get_current_user] function
*# PHP [http://php.net/manual/en/function.is-writable.php is_writable function]
=== 錯誤訊息: no such file or directory 找不到 PHP 路徑　===
<pre>
% php -v
zsh: no such file or directory: /Applications/MAMP/bin/php/php7.4.21/bin/php
</pre>
解決方法：找到 PHP 檔案路徑
* [[XAMPP]] on {{Mac}} {{kbd | key=<nowiki>/Applications/xampp/bin/php</nowiki>}}
* MAMP PRO on on {{Mac}} input the command ls {{kbd | key=<nowiki>/Applications/MAMP/bin/php/php*/bin/php</nowiki>}} to find the suitable version you want e.g. {{kbd | key=<nowiki>/Applications/MAMP/bin/php/php8.1.13/bin/php</nowiki>}}
If you are using zsh. Input the command {{kbd | key=<nowiki>vi ~/.zshrc</nowiki>}} to edit the file<ref>[https://castion2293.medium.com/mac%E4%B8%AD%E5%8D%87%E7%B4%9Aphp%E7%89%88%E6%9C%AC%E4%B8%A6%E8%A8%AD%E7%82%BA%E9%A0%90%E8%A8%AD-d7e6fdad9cc2 Mac中升級php版本並設為預設. 確認目前PHP的版本 | by Nick Zhang | Medium]</ref>
原檔案內容
<pre>
alias php='/Applications/MAMP/bin/php/php7.4.21/bin/php'
</pre>
修改後檔案內容
<pre>
alias php='/Applications/MAMP/bin/php/php8.1.13/bin/php'
</pre>
And then relaunch the shell
=== PHPExcel 產生的 Excel 檔案，開啟後看到一堆亂碼 ===
狀況1: 開啟 Excel 檔案，看到最前面有 {{kbd | key=<nowiki>NOTICE</nowiki>}} 的錯誤訊息，例如 {{kbd | key=<nowiki><b>Notice</b>:  Constant CONST_XXX already defined in <b>path\to\script.php</b> on line xx</nowiki>}}
* 解法: 關閉錯誤訊息輸出 ex: [http://www.php.net/manual/en/function.error-reporting.php error_reporting(0);] 以及修正 NOTICE 訊息指涉的問題，例如例子中常數重複宣告的問題。
狀況2: 開啟 Excel 檔案，看到最前面有 {{kbd | key=<nowiki>Fatal error</nowiki>}} 之類的錯誤訊息
* 解法: 關閉錯誤訊息輸出 ex: [http://www.php.net/manual/en/function.error-reporting.php error_reporting(0);] ，以及修正 Fatal error 訊息指涉的問題。
狀況3: 開啟 Excel 檔案，看到有儲存格位址之類的錯誤訊息
* 解法: 該儲存格內容以等號 (=) 開始，卻不是函數。解決方式是將儲存格內容的最前面加一個單引號 (') 或者是加個空白。




Retrieved from "https://wiki.planetoid.info/index.php/Special:MobileDiff/24807"

Navigation menu