Link the debug information of PHP with the Firefox Console

Source: Internet
Author: User
I learned a trick today, that is, if it is in Firefox or chrome, you can send the warning, error, and other information in PHP,

Output to the firebug console in different categories.

First, there is a debug class as follows:

class PHPDebug {function __construct() {    if (!defined("LOG"))    define("LOG",1);    if (!defined("INFO"))   define("INFO",2);    if (!defined("WARN"))   define("WARN",3);    if (!defined("ERROR"))  define("ERROR",4);    define("NL","\r\n");    echo '<script type="text/javascript">'.NL;    /// this is for IE and other browsers w/o console    echo 'if (!window.console) console = {};';    echo 'console.log = console.log || function(){};';    echo 'console.warn = console.warn || function(){};';    echo 'console.error = console.error || function(){};';    echo 'console.info = console.info || function(){};';    echo 'console.debug = console.debug || function(){};';    echo '</script>';    /// end of IE}function debug($name, $var = null, $type = LOG) {    echo '<script type="text/javascript">'.NL;    switch($type) {        case LOG:            echo 'console.log("'.$name.'");'.NL;        break;        case INFO:            echo 'console.info("'.$name.'");'.NL;        break;        case WARN:            echo 'console.warn("'.$name.'");'.NL;        break;        case ERROR:            echo 'console.error("'.$name.'");'.NL;        break;    }    if (!empty($var)) {        if (is_object($var) || is_array($var)) {            $object = json_encode($var);            echo 'var object'.preg_replace('~[^A-Z|0-9]~i',"_",$name).' = \''.str_replace("'","\'",$object).'\';'.NL;            echo 'var val'.preg_replace('~[^A-Z|0-9]~i',"_",$name).' = eval("(" + object'.preg_replace('~[^A-Z|0-9]~i',"_",$name).' + ")" );'.NL;            switch($type) {                case LOG:                    echo 'console.debug(val'.preg_replace('~[^A-Z|0-9]~i',"_",$name).');'.NL;                break;                case INFO:                    echo 'console.info(val'.preg_replace('~[^A-Z|0-9]~i',"_",$name).');'.NL;                break;                case WARN:                    echo 'console.warn(val'.preg_replace('~[^A-Z|0-9]~i',"_",$name).');'.NL;                break;                case ERROR:                    echo 'console.error(val'.preg_replace('~[^A-Z|0-9]~i',"_",$name).');'.NL;                break;            }        } else {            switch($type) {                case LOG:                    echo 'console.debug("'.str_replace('"','\\"',$var).'");'.NL;                break;                case INFO:                    echo 'console.info("'.str_replace('"','\\"',$var).'");'.NL;                break;                case WARN:                    echo 'console.warn("'.str_replace('"','\\"',$var).'");'.NL;                break;                case ERROR:                    echo 'console.error("'.str_replace('"','\\"',$var).'");'.NL;                break;            }        }    }    echo '</script>'.NL;}}

It is easy to use, as shown in the following example:

// include and instantiate the class    require_once("PHPDebug.php");    $debug = new PHPDebug();    // simple message to console    $debug->debug("A very simple message");    // vaiable to console    $x = 3;    $y = 5;    $z = $x/$y;    $debug->debug("Variable Z: ", $z);    // a warnign    $debug->debug("A simple Warning", null, WARN);    // info    $debug->debug("A simple Info message", null, INFO);    // An error    $debug->debug("A simple error messsage", null, ERROR);    // Array in console    $fruits = array("banana", "apple", "strawberry", "pineaple");    $fruits = array_reverse($fruits);    $debug->debug("Fruits array", $fruits);    // object to console    $book               = new stdClass;    $book->title        = "Harry Potter and the Prisoner of Azkaban";    $book->author       = "J. K. Rowling";    $book->publisher    = "Arthur A. Levine Books";    $book->amazon_link  = "http://www.amazon.com/dp/0439136369/";    $debug->debug("Object", $book);

In this way, you can display various warnings or errors in different categories on the browser console.

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.