WordPress error log

Updated: 28 May 2023

Write a variable to the error log with print_r

error_log(print_r($var, true));

Write a variable to the error log via var_dump

function error_log_var_dump( $var ){
    ob_start();
    var_dump( $var );
    $cont = ob_get_contents();
    ob_end_clean();
    error_log( $cont );
}

// Enable WP_DEBUG mode
define( 'WP_DEBUG', true );

// Enable Debug logging to the /wp-content/debug.log file
define( 'WP_DEBUG_LOG', true );

// Display errors and warnings
define( 'WP_DEBUG_DISPLAY', true );
@ini_set( 'display_errors', 1 );