更新2：
我现在已从.php文件中删除了以下内容：
<?php error_reporting( E_ALL ); ?>
我在php.ini中设置了display_erros，如下所示：
display_errors = On
错误报告在php.ini
中设置如下error_reporting = E_ALL | E_STRICT
重启apache后，我仍然没有收到任何错误/警告。
更新1：
我在php.ini中更改了error_reporting：
error_reporting = E_ALL＆amp; 〜E_DEPRECATED
到
error_reporting = E_ALL | E_STRICT
之后我重新启动了apache，例如
/etc/init.d/apache2 restart
但页面仍然不会显示任何类型的错误/警告。
原始问题：
以下脚本正在生成警告，因为$ err位于if语句中。为什么这个警告没有显示在Web浏览器的PHP页面上？我必须查看apache日志才能看到警告。另外，如果我故意将“insert into”更改为“delete into”，它不会在PHP页面上显示错误。为什么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>
答案 0 :(得分：1007)
可以在php.ini或您的Apache配置文件中关闭显示错误。
您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。
答案 1 :(得分：39)
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 (e.g., 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，我选择：
error_reporting = E_ALL ^ E_NOTICE ^ E_WARNING
另外不要忘记将display_errors放在
上display_errors = On
之后在Ubuntu上重启服务器以获取apache：
sudo /etc/init.d/apache2 restart
答案 2 :(得分：32)
我能够通过以下代码获得所有错误： -
ini_set('display_startup_errors',1);
ini_set('display_errors',1);
error_reporting(-1);
答案 3 :(得分：24)
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);
更多详情：
答案 4 :(得分：8)
在php.ini
;display_startup_errors = On
display_startup_errors=off
display_errors =on
html_errors= on
从您的php页面使用合适的过滤器进行错误报告。
error_reporting(E_ALL);
可根据要求制作文件夹。
E_ALL
E_ALL | E_STRICT
答案 5 :(得分：2)
您可以看到详细说明here。
// Report simple running errors
error_reporting(E_ERROR | E_WARNING | E_PARSE);
// Reporting E_NOTICE can be good too (to report uninitialized
// variables or catch variable name misspellings ...)
error_reporting(E_ERROR | E_WARNING | E_PARSE | E_NOTICE);
// Report all errors except E_NOTICE
error_reporting(E_ALL & ~E_NOTICE);
// Report all PHP errors (see changelog)
error_reporting(E_ALL);
// Report all PHP errors
error_reporting(-1);
// Same as error_reporting(E_ALL);
ini_set('error_reporting', E_ALL);
更新日志
5.4.0 E_STRICT成为E_ALL的一部分
5.3.0 E_DEPRECATED和E_USER_DEPRECATED介绍。
5.2.0 E_RECOVERABLE_ERROR介绍。
引入5.0.0 E_STRICT（不属于E_ALL）。