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Is there a way to write the debugging I do in my code (ex: error_log("$msg"); to a different log file than the rest of the system-generated logging that gets written to /wp-content/debug.log?

I would settle for being able to show only my debugging along with fatal errors and parse errors all in the same file, but setting:

define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);
@ini_set('display_errors', ~E_ALL & ~E_DEPRECATED & ~E_USER_DEPRECATED & ~E_NOTICE);

does not seem to do the trick.

Any suggestions?

1 Answer 1

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You can tell error_log() where to put its output:

error_log( 'my debugging output', 3, '/my/debug/log/location/log.txt' );

It might be more convenient to add your own function:

if ( ! function_exists( 'my_debug' ) ) {

  function my_debug( $x = '' ) {
    // Uses print_r() in case $x isn't a string.
    error_log( print_r( $x, 1 ), 3, '/my/debug/log/location/log.txt' );
  }

}

// ... elsewhere

my_debug( $the_variable_i_want_to_check );


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    Awesome - thanks!! I also added date('Y-m-d H:i:s') to the beginning of x so the date and time are captured and "\n" to the end so that each entry is displayed on a new line.
    – Daveh0
    Commented Feb 14 at 12:28

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