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Installing Apache, MySQL, and PHP
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Detecting and handling port conflicts on Mac OS X


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Installing Apache, MySQL, and PHP

with David Gassner

Video: Detecting and handling port conflicts on Mac OS X

When you install more than one copy of a particular server application, such as Apache or MySQL, and then try to run both at the same time, you will run into a port conflict. Apache, for example, listens on port 80 and only one application at a time can listen on that port. To demonstrate this, I have installed both the individual components, Apache and MySQL, and XAMPP represented by the XAMPP Controls panel, and MAMP represented by the MAMP application.
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  1. 17m 35s
    1. Welcome UPDATED
      1m 9s
    2. Understanding Apache, MySQL, and PHP
      7m 12s
    3. Using the exercise files
      1m 7s
    4. What's new in this update UPDATED
      3m 35s
    5. Choosing a software stack
      4m 32s
  2. 30m 18s
    1. Installing Apache HTTP Server 2.4 on Windows
      6m 51s
    2. Installing PHP 5.5 on Windows
      4m 12s
    3. Starting Apache from the command line
      5m 24s
    4. Installing MySQL on Windows UPDATED
      7m 24s
    5. Installing phpMyAdmin on Windows
      6m 27s
  3. 44m 5s
    1. Activating Apache on Leopard and Snow Leopard
      3m 35s
    2. Activating Apache on Lion
      5m 9s
    3. Activating Apache on Mountain Lion and Mavericks
      4m 57s
    4. Configuring personal site folders on Mountain Lion and Mavericks UPDATED
      6m 59s
    5. Activating PHP on Mac OS X
      6m 12s
    6. Installing MySQL on Mac OS X
      3m 59s
    7. Setting the root user password
      2m 28s
    8. Installing phpMyAdmin on Mac OS X
      6m 16s
    9. Uninstalling MySQL on Mac OS X
      4m 30s
  4. 14m 35s
    1. Installing WampServer
      6m 25s
    2. Managing WampServer
      2m 2s
    3. Defining directory aliases through WampServer
      2m 55s
    4. Changing software versions with WampServer add-ons
      3m 13s
  5. 10m 58s
    1. Installing MAMP UPDATED
      4m 6s
    2. Configuring Apache and MySQL server ports UPDATED
      1m 57s
    3. Managing MAMP UPDATED
      4m 55s
  6. 29m 3s
    1. Installing XAMPP for Windows UPDATED
      10m 0s
    2. Managing XAMPP for Windows
      4m 4s
    3. Managing MySQL security through XAMPP for Windows
      2m 40s
    4. Installing XAMPP for Mac OS X UPDATED
      6m 14s
    5. Managing XAMPP for Mac OS X
      2m 27s
    6. Managing MySQL security through XAMPP
      3m 38s
  7. 13m 20s
    1. Installing BitNami for Windows
      6m 31s
    2. Installing BitNami for Mac OS X UPDATED
      6m 49s
  8. 18m 49s
    1. Handling port conflicts with Skype on Windows
      2m 37s
    2. Handling other port conflicts on Windows
      5m 19s
    3. Detecting and handling port conflicts on Mac OS X
      6m 26s
    4. Configuring Apache to work with IPv6 on Windows 8
      4m 27s
  9. 31s
    1. Goodbye
      31s

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Installing Apache, MySQL, and PHP
2h 59m Intermediate Jan 21, 2011 Updated Mar 28, 2014

Viewers: in countries Watching now:

Installing Apache, MySQL, and PHP with David Gassner describes how to install and configure Apache HTTP server, MySQL database server, and PHP, known as the AMP stack, on a local development computer. Chapters are devoted to multiple installation approaches: installing the components separately on both Windows and Mac (including coverage of Apache and PHP on Mac OS X 10.7 Lion and 10.8 Mountain Lion), installing the pre-packaged Apache and MySQL distributions in WampServer on Windows and MAMP on Mac, and installing the cross-platform XAMPP and Bitnami on both Mac and Windows. Exercise files are included with the course.

This course was updated on 07/06/2012.

Topics include:
  • Performing Apache, PHP, and MySQL as separate installs
  • Activating Apache and PHP on Leopard, Snow Leopard, and Lion
  • Setting the MySQL root user password
  • Installing WampServer
  • Changing software versions with WampServer add-ons
  • Installing MAMP
  • Configuring MAMP's Apache and MySQL server ports
  • Installing XAMPP for Windows and Mac
  • Managing MySQL security through XAMPP
  • Installing Bitnami for Windows and Mac
  • Detecting and handling port conflicts
  • Working with Apache and IPV6 in Windows 8
Subjects:
Developer Web Servers Databases
Software:
MySQL PHP HTTP Server Apache HTTP Server
Author:
David Gassner

Detecting and handling port conflicts on Mac OS X

When you install more than one copy of a particular server application, such as Apache or MySQL, and then try to run both at the same time, you will run into a port conflict. Apache, for example, listens on port 80 and only one application at a time can listen on that port. To demonstrate this, I have installed both the individual components, Apache and MySQL, and XAMPP represented by the XAMPP Controls panel, and MAMP represented by the MAMP application.

Now, I'll go into the System Preferences and show you that both MySQL and Apache are running. I'll go into MySQL and show that the MySQL Server instance is running and then I'll go to Sharing and show you that Web Sharing is selected. Now, I'll show you what happens in XAMPP and MAMP when you try to run the same applications. XAMPP gives you a lot of help. I'll click the Start button for Apache and I get a really clear message. Web Sharing is on! And it tells me exactly how to fix the problem.

I can do the same thing for MySQL and once again I get a great error message. If you're working with MAMP though, this symptom is less clear. I'll click Start Servers in the MAMP application and simply nothing happens. Both the Apache Server red light and the MySQL Server red light stay lit. They don't switch to green. That's an indicator that the applications weren't able to start. Now the simplest thing to do is to go back to System Preferences and turn off the applications.

So I'll go to Sharing and deselect Web Sharing and then go back to the main System Preferences pane and go into MySQL and click Stop MySQL Server. If I'm prompted at any point for my Administrator password I'll type it in. Once the applications are stopped, I should be able to start Apache and MySQL for my selected server bundle. So I'll go to XAMPP and click Start on Apache. Once again I'm prompted for the Password, and I'll click Start for MySQL, and this time both start successfully.

Now I can't have XAMPP's versions of these servers and MAMP's running at the same time. So if I click Start Servers here I'll run into the same problem. Now I'm going to turn off the XAMPP versions and restart the individual components. I'll restart MySQL Server and restart Apache and I'll show you a way of finding out which versions of these servers are actually running, using some commands in Terminal. I'll go to Terminal by going to Spotlight, typing terminal, and choosing the application Terminal.

Within the application I am going to use a command called lsof, which stands for List Open Files. I'll run this command as the superuser. So I'll start with superuser do, or sudo, then a space, then lsof and then I'll add a couple of parameters, -i and -P. Then I'm going to filter the result of this command and look for applications that are running on a particular port. MySQL runs on Port 3306.

To do the filtering I'll type in the pipe character then grep, which searches text, and then the string I'm looking for, 3306. If I'm prompted for my Administrator password I'll type it in. This process might take a few seconds the first time you run it so be patient. So this shows me that MySQL is in fact running. It tells me that the name of the process is mysqld and it assigns a Process ID, which is random, of 29585.

Now, to stop the process I could go back to my System Preferences pane. I'll go to MySQL and I could click Stop MySQL Server. But another way of doing this is to kill the process from the command line, using the UNIX command Kill. You do this by the Process ID. So I'll double-click the Process ID and copy it to the clipboard. And then I'll type sudo, for superuser do, then kill and then I'll paste in the Process ID.

I'll go back to the System Preferences pane and show that the MySQL Server instance has stopped. You can do the same thing for the Apache server. So I'll type in sudo lsof -i -P, then the pipe character, grep, and then I'll search for port 80. Now make sure that you don't have any web browsers currently running. If you have browsers running you'll to get back a whole bunch of more information than you expect.

So I'll just go down to my Dock and make sure I don't have Firefox or Google Chrome or Safari running, then I'll come back to Terminal and press Return. Once again, it might take a few seconds for the process and the search to complete. Here is the response. Notice I'm getting back more information than I am expecting. What I'm really looking for is this string, :80, and I see that there are two processes running with httpd, the actual name of the Apache HTPP Server process.

If I wanted to kill these processes from the command line I could once again select and copy the Process IDs and kill them, but this time I'll stop the process from the System Preferences pane. I'll go back to the Sharing pane. I'll deselect Web Sharing. I'll come back to Terminal and press the up arrow key to restore the last command. I'll press Return and once again it'll take a few seconds to run the process. And when the response comes back, the httpd processes are not there anymore.

So that's a look in various ways of how to diagnose and then solve port conflict situations. Again, you can only have one copy of Apache and one copy of MySQL running at a time, and if you're not sure where the ports are being used you can use both the applications that come with these products and some commands in the Terminal application to diagnose and solve your issues.

Find answers to the most frequently asked questions about Installing Apache, MySQL, and PHP.


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Q: I followed the procedure in the "Installing XAMP for Windows" video, but 1) I got no text file popup after install, and 2) the Admin button does not bring up phpMyAdmin page. Nothing happens even though the Running button is green.

A: The text window not popping up after the installation is just a difference in the installation flow; it shouldn't cause any functional problems.

The issue around phpMyAdmin not opening correctly from the Xampp Control Panel has come up before. There is a bug in the newest version of Xampp for Windows (version 1.7.4) that affects the Control Panel. After starting the Control Panel, and then starting both Apache and MySQL, clicking the MySQL Admin button doesn't open the browser to the phpMyAdmin as expected. However, both MySQL and phpMyAdmin are working correctly.

Follow these steps instead:
  1. Click the Admin button next to Apache to open the Xampp home page in the browser.
  2. Click phpMyAdmin under the Tools section of the menu on the left side of the page.
phpMyAdmin should open correctly. From that point, you should be able to manage your database.
Q: I'm using TextWrangler on the Mac to uncomment the following line in the httpd.conf file, as shown in the video "Activating PHP with the included Apache server" in Chapter 2:

LoadModule php5_module libexec/apache2/libphp5.so

When I try to save the changes, I get the message "Error code: -5000". What's going wrong?
A: This is a common issue with the latest version of TextWrangler. Here's another way of editing the file with a command line editor named Pico that's included in Mac OS X. Remember, most text editors don't give you the ability to edit files as the "root user", and you need those rights to edit the httpd.conf file.

Unlike TextWrangler, Pico doesn't accept mouse input, so you have to do everything with the keyboard:
  1. Open Terminal from /Applications/Utilities/Terminal.
  2. Type sudo pico /private/etc/apache2/httpd.conf.
  3. Type your password and press Return.
  4. Press Ctrl+W for 'Where is'.
  5. Type 'php' and press Return. You should find the commented-out line with php5_module
  6. Delete the '#' at the beginning of the line.
  7. Press Ctrl+X for 'Exit'.
  8. Press Y for 'Yes'.
  9. Press Return to save and exit
We recommend also using Pico to edit the php.ini file.
Q: After downloading XAMPP I was unable to start Apache from the control panel. MySQL started fine. When I click the Start button next to Apache it looks like it starts and then stops. Here is the output:

Busy
Apache Started (Port 80)

The MySQL button says "running" with a stop button; the Apache button still? says start no matter how many time I click it.
A: This usually means that another program is using Port 80 (the port that Apache needs). Port 80 is used for any web server, so you either have another web server running or you're running something else (usually Skype) that is using Port 80.

If you're running Skype (and this is really common), you need to configure it to use a different port. If it's not Skype, it may be that you're running another web server or IIS (Microsoft Internet Information Server, the web server that comes with Windows), which you'll need to quit.
Q: This course was updated on 07/06/2012. What changed?
A: A few of the WampServer movies were updated to reflect the new user interface. We also added movies on installing Bitnami, an open source stack solution, and troubleshooting Apache to work with IPV6 on Windows 8.
Q: This course was updated on 01/09/2012. What changed?
A: Two new movies were added to Chapter 2, "Installing Separate Components on Mac OS X," to reflect the changes in the latest version of Mac OS X, Mountain Lion (version 10.8). These movies cover activating Apache and configuring personal site folders in Mountain Lion.
Q: This course was updated on 8/23/2013. What changed?
A: We added new software download locations and coverage of Apache HTTP Server 2.4 on Windows, as well as information on managing Apache from the command prompt, editing hidden config files with the nano editor, and installing the new version of Bitnami on Windows and Mac OS X.
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