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    <p>PHP has</p> <ul> <li><a href="http://de3.php.net/manual/en/function.error-log.php" rel="nofollow"><code>error_log</code></a> — <em>Sends an error message to the web server's error log, a TCP port or to a file</em> and</li> <li><a href="http://de3.php.net/manual/en/function.trigger-error.php" rel="nofollow"><code>trigger_error</code></a> — <em>Generates a user-level error/warning/notice message</em></li> </ul> <p>which you can use to trigger and log the <a href="http://de3.php.net/manual/en/errorfunc.constants.php" rel="nofollow">predefined error types</a>, e.g.</p> <pre><code>trigger_error( "Custom Warning", E_USER_WARNING ); </code></pre> <p>Third party libraries exists with</p> <ul> <li><a href="http://pear.php.net/package/Log/redirected" rel="nofollow">PEAR Log</a> and</li> <li><a href="http://zendframework.com/manual/en/zend.log.html" rel="nofollow">Zend_Log</a></li> </ul> <p>You can configure various destinations to log to. Usage is via an OO interface:</p> <pre><code>$logger-&gt;log('Informational message', Zend_Log::INFO); </code></pre> <p>and there is also the Log4J inspired</p> <ul> <li><a href="http://logging.apache.org/log4php/index.html" rel="nofollow">Log4PHP</a> </li> </ul> <p>Apart from that there is <a href="http://www.xdebug.org/" rel="nofollow">XDebug</a> and <a href="http://www.zend.com/en/products/studio/downloads" rel="nofollow">Zend Debugger</a>. There is also a PECL extension with <a href="http://de3.php.net/manual/en/book.apd.php" rel="nofollow">Advanced PHP Debugger (APD)</a></p>
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    1. PODoes PHP have built-in debugging logging like Ruby on Rails logger.info() to a development.log file?
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    1. CO+1 short and precise answer.
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      1. USMichael
    2. CO+1 for mentioning xdebug -- it changed the way I develop for PHP.
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      1. USbogeymin
    3. COI'm sorry, my question wasn't clear. I'm not looking for a "log4" utility, but an automatic diagnostic.
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      1. USPete Alvin
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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