Daniel Dvorkin

I’m working on a nice admin screen to config auto-logging of some common things (like wp_query in pre_get_posts and wp), and some other goodies.
To log things manually, you can use:
<pre><code>browser()->log ( $var, $label );
browser()->warn ( $var, $label );
browser()->info ( $var, $label );
browser()->error( $var, $label );
</code></pre>
Also, commandas are chainable:
<pre><code>browser()->log( 'This is a log...' )->error( '...and this is an error' );
</code></pre>
For example, to log all your main query’s query_vars:
<pre><code>add_filter( 'pre_get_posts', 'log_wp_query', 10000 );

function log_wp_query( $query ) {
 if ( $query->is_main_query() )
 browser()->log( $query->query_vars, 'pre_get_posts' );

 return $query;
}
</code></pre>
<h4>Filters</h4>
wplinb-match-wp-debug: Set to true to only log when wp_debug is true. To prevent logging when wp_debug is false:
<pre><code>add_filter( 'wplinb-match-wp-debug', '__return_true' );
</code></pre>
wplinb-enabled: To disable logging completely. It takes precedence over wplinb-match-wp-debug. To disable logging:
<pre><code>add_filter( 'wplinb-enabled', '__return_false' );
</code></pre>
<h4>Profiling</h4>
The plugin includes a really simple function to allow you to track execution time of different parts of your code.
<pre><code>browser()->timer( $key, $log = false );
</code></pre>
The first time you call this function with a given $key (string) it will start a timer, and return false. You can start as many timers as you want, using different $key values. You can ignore the second parameter for this first call.
The second time you call this function with a given $key, it will return the ellapsed time in seconds since you started this $key timer. If you set the second parameter to true, it will also log this value to the browser.
Example 1: Sequential use, log manually.
<pre><code>browser()->timer( 'Mega loop' );
for ( $i = 0; $i < 1000000; $i++ ) {
 //do something
}
$time = browser()->timer( 'Mega loop' );
browser()->log( $time, 'The mega loop took:' );
</code></pre>
Example 2: Start and end in different places, log automatically.
<pre><code>add_action( 'posts_selection', 'start_timer', 100 );
add_filter( 'the_posts', 'end_timer', 1, 2 );

function start_timer( $query ) {
 browser()->timer( 'Main query time' );
}

function end_timer( $posts, $query ) {
 browser()->timer( 'Main query time', true );
 return $posts;
}
</code></pre>
This is not a good way of measuring how much time a query takes to run, it’s just to illustrate how to use the timer.
In exactly the same way, you can use the function
<pre><code>Browser()->memory( $key, $log = false );
</code></pre>
to measure delta of memory consumption from your first call and your second call with the same $key.
Example:
<pre><code>Browser()->memory( 'testing' );
$test = array();
for ( $i = 0; $i < 100; $i++ ) {
 $test[$i] = md5( rand( 1, $i ) );
}
Browser()->memory( 'testing', true );


Browser()->memory( 'testing' );
$test = array();
for ( $i = 0; $i < 10000; $i++ ) {
 $test[$i] = md5( rand( 1, $i ) );
}
Browser()->memory( 'testing', true );
</code></pre>

WP Log in Browser

Allows you to log data from your PHP WordPress code to your browser's console.

Annoyed you can't var_dump from an AJAX handler? Not anymore …

Drew Jaynes

koopersmith

Adds a PHP/SQL console to the debug bar. Requires the <a href="https://wordpress.org/extend/plugins/debug-bar/" rel="ugc">Debug Bar plugin</a> (v0.5 or later).

Debug Bar Console

Very easy to use and useful for debugging

(CA)
L'ús és molt senzill i és molt util per desenvolupar plugins

Very easy to use and useful for debugging


Update 2024-10-28: I've adopted this plugin and taken over development.



I use this add-on for the Debug Bar plugin on personal, client, and customer sites all the time and it never fails to help me solve problems more efficiently. It's a shame that it no longer shows up in plugin search results because the tested-up-to version is out of date, but that doesn't stop me from manually installing it. Consistently reliable and gets the job done. This plugin is vital to my WordPress debugging toolbox.


Great utility, works every time!

Adds a PHP/SQL console to the Debug Bar. Requires the Debug Bar plugin.

WP Log in Browser vs Debug Bar Console