显示所有错误和警告
更新2：
我现在从.php文件中删除了以下内容：
<?php error_reporting( E_ALL ); ?> 我已经在php.ini中设置了display_erros，如下所示：
display_errors = On
错误报告在php.ini中设置为以下内容
error_reporting = E_ALL | E_STRICT
重新启动Apache后，我仍然没有错误/警告。
更新1：
我已经改变了php.ini中的error_reporting：
error_reporting = E_ALL＆〜E_DEPRECATED
至
error_reporting = E_ALL | E_STRICT
之后，我重新启动Apache，例如
/etc/init.d/apache2重新启动
但是页面仍然不会显示任何错误/警告。
原文问题：
以下脚本正在生成警告，因为$ err在if语句中。 为什么这个警告不会显示在网页浏览器的PHP页面上？ 我必须看看Apache日志，看看警告。 此外，如果我delibrately更改“插入到”“删除到”，它不会显示错误的PHP页面上。 为什么这些错误不会显示在实际的PHP页面上？
<?php error_reporting( E_ALL ); ?> <html> <head> <title></title> <link rel="icon" type="image/png" href="favicon.ico"> <?php if( $_SERVER['REQUEST_METHOD']=='POST' ) { $err = array(); if( empty( $_POST['display_name'] ) ) $err[] = "display name field is required"; if( empty( $_POST['email'] ) ) $err[] = "email field is required"; if( empty( $_POST['password'] ) ) $err[] = "password field is required"; if( !$err ) { try { $DBH = new PDO( "mysql:host=localhost;dbname=database1", "user", "pass" ); $DBH -> setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION ); $STH = $DBH -> prepare( "delete into table1 (display_name, email, password) values ( :display_name, :email, :password )" ); $STH -> bindParam( ':display_name', $_POST['display_name'], PDO::PARAM_STR, 100 ); $STH -> bindParam( ':email', $_POST['email'], PDO::PARAM_STR, 100 ); $STH -> bindParam( ':password', $_POST['password'], PDO::PARAM_STR, 100 ); $STH -> execute(); $STH = $DBH -> prepare( "delete into table2 ( username, status, users_id ) values ( :username, :status, :users_id )" ); $strStatus = 1; $STH -> bindParam( ':username', $_POST['display_name'], PDO::PARAM_STR, 100 ); $STH -> bindParam( ':status', $strStatus, PDO::PARAM_INT, 1 ); $STH -> bindParam( ':users_id', $_POST['referer'], PDO::PARAM_INT, 1 ); $STH -> execute(); $DBH = null; } catch( PDOException $e ) { echo $e -> getMessage(); } header( "Location: ".$_SERVER['PHP_SELF'] ); exit; } else { foreach( $_POST as $key => $val ) { $form[$key] = htmlspecialchars($val); } } } else { $form['display_name'] = $form['email'] = $form['password'] = ''; } ?> </head> <body> <?php foreach( $err as $line ) { ?> <div style="error"><?php echo $line; ?></div> <?php } ?> <h1>register</h1> <form method="post"> referers id:<br /> <input type="text" name="referer" /><br /><br /> name:<br /> <input type="text" name="display_name" value="<?php echo $form['display_name']; ?>" /><br /><br /> email:<br /> <input type="text" name="email" value="<?php echo $form['email']; ?>" /><br /><br /> password:<br /> <input type="text" name="password" value="<?php echo $form['password']; ?>" /><br /><br /> <input type="submit" value="register" /> </form> </body> </html>
显示错误可能被closures在php.ini或您的Apacheconfiguration文件。
你可以在脚本中打开它：
error_reporting(E_ALL); ini_set('display_errors', 1);
您应该在PHP错误日志中看到相同的消息。
直接从php.ini文件：
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; Error handling and logging ; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; This directive informs PHP of which errors, warnings and notices you would like ; it to take action for. The recommended way of setting values for this ; directive is through the use of the error level constants and bitwise ; operators. The error level constants are below here for convenience as well as ; some common settings and their meanings. ; By default, PHP is set to take action on all errors, notices and warnings EXCEPT ; those related to E_NOTICE and E_STRICT, which together cover best practices and ; recommended coding standards in PHP. For performance reasons, this is the ; recommend error reporting setting. Your production server shouldn't be wasting ; resources complaining about best practices and coding standards. That's what ; development servers and development settings are for. ; Note: The php.ini-development file has this setting as E_ALL. This ; means it pretty much reports everything which is exactly what you want during ; development and early testing. ; ; Error Level Constants: ; E_ALL - All errors and warnings (includes E_STRICT as of PHP 5.4.0) ; E_ERROR - fatal run-time errors ; E_RECOVERABLE_ERROR - almost fatal run-time errors ; E_WARNING - run-time warnings (non-fatal errors) ; E_PARSE - compile-time parse errors ; E_NOTICE - run-time notices (these are warnings which often result ; from a bug in your code, but it's possible that it was ; intentional (eg, using an uninitialized variable and ; relying on the fact it is automatically initialized to an ; empty string) ; E_STRICT - run-time notices, enable to have PHP suggest changes ; to your code which will ensure the best interoperability ; and forward compatibility of your code ; E_CORE_ERROR - fatal errors that occur during PHP's initial startup ; E_CORE_WARNING - warnings (non-fatal errors) that occur during PHP's ; initial startup ; E_COMPILE_ERROR - fatal compile-time errors ; E_COMPILE_WARNING - compile-time warnings (non-fatal errors) ; E_USER_ERROR - user-generated error message ; E_USER_WARNING - user-generated warning message ; E_USER_NOTICE - user-generated notice message ; E_DEPRECATED - warn about code that will not work in future versions ; of PHP ; E_USER_DEPRECATED - user-generated deprecation warnings ; ; Common Values: ; E_ALL (Show all errors, warnings and notices including coding standards.) ; E_ALL & ~E_NOTICE (Show all errors, except for notices) ; E_ALL & ~E_NOTICE & ~E_STRICT (Show all errors, except for notices and coding standards warnings.) ; E_COMPILE_ERROR|E_RECOVERABLE_ERROR|E_ERROR|E_CORE_ERROR (Show only errors) ; Default Value: E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED ; Development Value: E_ALL ; Production Value: E_ALL & ~E_DEPRECATED & ~E_STRICT ; http://php.net/error-reporting error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT
对于纯粹的发展我去：
error_reporting = E_ALL ^ E_NOTICE ^ E_WARNING
另外不要忘记把display_errors打开
display_errors = On
之后，在Ubuntu上重新启动Apache的服务器：
sudo /etc/init.d/apache2 restart
我能通过下面的代码得到所有的错误：
ini_set('display_startup_errors',1); ini_set('display_errors',1); error_reporting(-1);
在php.ini上设置这些
;display_startup_errors = On display_startup_errors=off display_errors =on html_errors= on
从你的PHP页面使用合适的filter进行错误报告。
error_reporting(E_ALL);
可以根据需要制作文件。
E_ALL E_ALL | E_STRICT
Php错误可以显示为以下任何一种方法：
ini_set('display_errors', 1); ini_set('display_startup_errors', 1); error_reporting(E_ALL); display_errors = on;
更多细节：
