a debugging function for php

wp_print_r.php

<?php
if ( !function_exists( 'wp_print_r' ) ) {
    /**
     * Debugging function
     *
     * @param mixed $var the variable name
     * @param string $title title of the variable
     * @param bool $die if to die or not
     */
    function wp_print_r( $var, $title = '', $die = false ) {
        if ( !empty( $title ) ) {
            printf( '<h3>%s</h3>', $title );
        }

        if ( extension_loaded( 'xdebug' ) ) {
            var_dump( $var );
        } else {
            printf( '<pre>%s</pre>', print_r( $var, true ) );
        }

        if ( $die ) {
            die();
        }
    }
}