Installation Of Php Mariadb And Apache-Books Pdf

Installation of PHP MariaDB and Apache
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Installation of PHP MariaDB and Apache, Apache HTTP Server has been the most popular web server since 1996 According to a. survey done by Netcraft in July 2013 Apache HTTP Server is the preferred web server. for over 50 percent of all active websites on the Internet Apache HTTP Server is also. popularly used as a load balancer Load balancing as the name suggests is a method. in which requests from clients are distributed across multiple computers to handle. the work load By employing a load balancer with a cluster of computers running. our application we can achieve high availability for our website We will be taking. a deeper dive into load balancing and high availability concepts in later chapters. PHP is a popular server side scripting language that is commonly used for web. development and is currently used by more than 244 million websites The stable. version of PHP recommended at the time of this writing is 5 5 having said this. many of the existing websites and hosts use PHP 5 4 PHP 5 3 or versions less than. PHP 5 3 We will be using PHP 5 5 in this book PHP is an interpreted programming. language the PHP code is executed line by line and is converted into operation. code opcode Opcode consists of machine language instructions that specify the. operation that is to be performed As the PHP code has to be interpreted for every. request the time taken to complete a request can be slower when compared to. precompiled languages the reason being that the compiled languages compile the. code only once and execute the compiled code whenever required However PHP. 5 5 comes with an inbuilt opcode cache that stores the output of the PHP bytecode. compiler in the memory The opcode cache helps in reducing the time taken. for interpretation of the PHP code for future requests and for disk input output. operations The opcode cache is not enabled by default and we will enable it in. Chapter 7 Caching, PHP 5 3 is the most installed version. MariaDB is a relational database management system RDBMS that is forked. from the popular MySQL database management system It is claimed to be a. drop in replacement database for MySQL MariaDB was initially released by. Michael Monty Widenius and a team of core MySQL developers in January 2009. after concerns were raised by the original developers of MySQL about the direction. in which MySQL was headed after it was acquired by Oracle As MariaDB is. considered to be a drop in replacement the developers working on MariaDB. take a lot of care to make sure that the code that they add is compatible with. the existing MySQL APIs and commands, Subqueries replication of data and indexing are faster in. MariaDB when compared to MySQL, Bonus chapter 1, Installing AMP on Mac OS X. On a MAC OS X operating system for web development using the AMP stack. the first step will be to turn on the Web Sharing option Web Sharing opens up the. required ports for HTTP thereby allowing other users to view web pages that are. available on this server To turn on Web Sharing click on the System Preferences. icon available in the dock click on the Sharing icon and make sure that the Web. Sharing checkbox is checked If not click on the checkbox next to Web Sharing. to save the settings then click on the lock icon at the bottom left corner of the. System Preferences window as shown in the following screenshot. Now we are all set to start working on the AMP stack We will begin by opening. up a terminal window that provides us a shell to communicate with the operating. system and allows us to execute the commands To open up a terminal window. click on Finder in the dock then click on Applications then click on Utilities. and finally double click on Terminal, The path can be explained as Finder Applications.
Utilities Terminal, Installation of PHP MariaDB and Apache. The Apache web server which already comes preinstalled with Mac OS X is. system software and regular user accounts do not have enough permission to work. with Apache In order to work with Apache we would need root access and we. would use the Terminal window to request root access For requesting root access. type sudo su in the terminal app On hitting the return key the operating system. prompts the user for the root user s password The following screenshot displays. the terminal app, Once we have root access the next step is to start the preinstalled Apache web. server We will be using the start command to fire up our Apache web server. as shown in the following screenshot, Now that we have our web server up and running it is time for us to look at. the existing settings of our Apache web server These settings are stored in the. httpd conf file This configuration file along with other configurations files for. Apache is stored in the etc apache2 folder I will be using the vi text editor for. accessing and editing the file but any text editor of your choice can be used to. modify this configuration file, A good way to familiarize yourself with the vi editor is to use. Vimtutor a tutor designed to help working with the vi editor. Keep in mind that we would need root access to modify this file and we have. already requested for root permissions in the terminal window The following. screenshot displays the usage of the vi editor for accessing and editing the. httpd conf file stored in the etc apache2 folder, Bonus chapter 1.
The first change that we will be making to the httpd conf file is to modify. DocumentRoot The DocumentRoot folder contains all files that are accessible to. the web server Any files outside DocumentRoot are not accessible to the web server. and therefore are not available to the outside world Comment out the existing. DocumentRoot by adding at the beginning of the current DocumentRoot Add a. new line beneath and set it to a preferred location We will be using var www as. our DocumentRoot shown as follows, The second change that we will be making is to replace the value of the existing. directory that has been set to the new the directory location for DocumentRoot. as shown in the following screenshot, Now save the changes and exit from the configuration file Apache web server. reads this configuration file upon start and in order to make these changes active. we will have to restart the web server, It is recommended to use the configtest option provided by. apachectl to test the configuration before restarting Apache. Installation of PHP MariaDB and Apache, We will be using the restart command to restart the Apache web server as shown. in the following screenshot, We have now completed setting the document root and have restarted the Apache.
web server so that it can start accessing the document root Now we will have to create. a folder that will be used as the document root To create a folder for the document. root we will be using the mkdir command as shown in the following screenshot. Now that the document root is created we will have to provide Apache web server. with the required access to this folder This access would allow Apache to read. write and or execute the files in the document root as needed The etc passwd. file stores the list of users that are available on this machine and gives a description. of their role We will use this file to get the user identity for the Apache web server. shown as follows, Apache is registered as a www user and the description of the user is World Wide. Web Server The next step is to provide ownership access for the www user to our. document root folder var www We will be using the chown command to change the. owner and group access for our document root shown as follows. Bonus chapter 1, Use the cd command to enter into the var www folder and use your favorite. editor to create a test HTML web page The aim of this web page would be. to determine if Apache is working as expected and if it serves the content as. requested The following screenshot displays the HTML web page. Now save the HTML file and load the web page in a web browser To access this web. page we will build the URL by appending the file name to localhost Now add. this URL to the address bar in your favorite web browser and hit Return We should. receive the success message that has been added in between the paragraph tags. shown as follows, The localhost hostname in computer networking is considered to be the current. computer and the users can use this as a hostname to access the computer s internal. network via the loopback interface The IP address that this hostname is mapped to is. 127 0 0 1 and this IP address can be interchanged with localhost to load the files. 127 0 0 1 is the IP address for the IPv4 loopback addresses. For the IPv6 loopback address use 1 That is a 128 bit number. with the first 127 bits being 0 and the 128th bit being 1. Installation of PHP MariaDB and Apache, We have successfully tested that Apache is working Now let us turn our attention to. PHP PHP comes preinstalled out of the box the PHP version on Mac Mavericks is. 5 4 while the PHP version on Mac Lion is 5 3 PHP is by default turned off for web. development on Apache and needs to be turned on by uncommenting the line that. has the instructions to load the php5 module when Apache is started Open up the. Apache configuration file etc apache2 httpd conf that we worked on earlier. in this chapter to set the document root Search for the string php5 module and. uncomment that line by removing the tag shown as follows. We will have to restart the web server for Apache to recognize the changes that. we have made in the configurations Let us use the restart command that we. have used earlier to restart our Apache HTTP Server The current stable version of. PHP is 5 5 and we will be installing PHP 5 5 in the next few steps We will leave. the preinstalled PHP package as it is and this preinstalled version can be used for. testing features across versions For the installation of PHP 5 5 we will be using the. shell script that is available on http php osx liip ch they provide a shell. script that installs and builds PHP We will be using the curl command to make a. command line request to the shell script and mention 5 5 as the version of PHP that. we would want to install as shown in the following screenshot. Upon the successful execution of the earlier curl command PHP 5 5 is now. installed in usr local php5 We will have to add the location of the binaries. of PHP 5 5 to the PATH variable in order to start using it We will be using the. bash profile file for appending the location of the PHP 5 5 binaries to the PATH. variable The bash profile file is commonly used for storing configurations that. have to be loaded when a user s login is successful and since Mac OS X s terminal. app runs a login in the background every time a terminal shell is opened the. configurations that we add to the bash profile file are loaded by default. Bonus chapter 1, If a bash profile file does not exist it has to be created.
Use a text editor of your choice to open up or create the bash profile file. In the bash profile file let s append the location of PHP 5 5 binaries to the. existing PATH variable The PATH variable is an environmental variable that keeps. a track of directories for the shell to search for executable files in response to the. commands issued by users This is a quick way for the operating system to store. the metadata of the locations of the executable files The locations of the directories. that contain the executable files are stored in a colon separated string When a new. directory location is added to the PATH variable it is only available within the scope. of the script We will use the export keyword to make it available outside the scope. of that script as shown in the following screenshot. Add export PATH usr local php5 bin PATH to your bash profile file. as shown in the previous screenshot and save it Now that the PATH variable has. been modified we can quickly check if our change was successful by echoing the. PATH variable in the shell The result would be negative the reason being that our. configurations in the bash profile file are loaded only when a new shell is loaded. Unless we reload the configurations the changes made to the PATH variable will not. be available in the context of the current shell, Installation of PHP MariaDB and Apache. There are two ways of reloading the bash profile file the first is to use the. source command followed by bash profile and the other method is just to use. the character to reload the configurations as shown in the following screenshot. Once the bash profile file is reloaded the new PATH variable will be available and. then we will be able to verify the version of PHP that we have installed earlier in this. chapter We will be using the v option that is provided by the PHP executable to. print the current version of PHP, The previous screenshot reflects a successful installation of PHP 5 5 Now the next. step is to install MariaDB on Mac OS X For installation of MariaDB on Mac OS X. we will be using Homebrew which is popularly described as the missing package. manager for Mac OS X, If Homebrew is not installed run the following installation. command in the terminal app, ruby e curl fsSL https raw github com. Homebrew homebrew go install, Bonus chapter 1, Once Homebrew is installed run brew update to get all the required updates.
our application we can achieve high availability for our website We will be taking a deeper dive into load balancing and high availability concepts in later chapters PHP is a popular server side scripting language that is commonly used for web development and is currently used by more than 244 million websites The stable

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