Install PHP on Linux
Install PHP on Ubuntu Linux
If you are running Ubuntu, add deb http://security.ubuntu.com/ubuntupool/main/p/php5/ hardy-security main in your /etc/apt/sources.list
file using any text editor.
Alternatively, you can follow these steps to find and download PHP for Ubuntu :
To obtain php installer for ubuntu Linux, go the the packages.ubuntu.com.
Scroll down and find Search package directories.
Give PHP5 in the keyword field and select your Ubuntu version from Distribution.We used Hardy.
In the resulting page, find Package libapache2-mod-php5 and click on hardy (it's a link).
Find Download libapache2-mod-php5 in the resulting page.
Click on amd64 if you are using 64 bit AMD Processor, click on i386 for Intel processor.
Click on http://security.ubuntu.com/ubuntu/pool/main/p/php5/libapache2-mod-php5_5.2.4-2ubuntu5.10_i386.deb in the resulting page and save the downloaded file.
After obtaining the PHP installer, start root terminal and fire following commands :
aptitude install php5 libapache2-mod-php5 and to restart apache web server (we used version 2) /etc/init.d/apache2
You must have root privilege for installing php. So, either you use su or you run it from root terminal.
Now create a php script like <?php echo phpinfo(); ?> and save it as test.php in the root directory of Apache web server i.e. /var/www.
Make sure you have read and executed permissions for /var/www and all of it's sub directories and files.
Install PHP on CentOS Linux
Prerequisite and Installation
You must have apache server up and running.
Log in as root or use root privilege for installing php on CentOs. We have used CentOs 5.3 for this tutorial.
After you have downloaded PHP5 for CentOs, use the following command :
yum install php
On CentOS, default document root is vi /var/www/html.
Now create a php script like <?php echo phpinfo(); ?> and save it as test.php in the root directory of Apache web server i.e. /var/www/html.
Make sure you have read and executed permissions for /var/www/html and all of it's sub directories and files.
Run http://localhost/test.php or http://your-ip-address/test.php. If you get an output showing that PHP is installed, you have successfully installed PHP.
PHP: Tips of the Day
PHP: How to convert string to boolean?
Strings always evaluate to boolean true unless they have a value that's considered "empty" by PHP (taken from the documentation for empty):
- "" (an empty string);
- "0" (0 as a string)
If you need to set a boolean based on the text value of a string, then you'll need to check for the presence or otherwise of that value.
$test_mode_mail = $string === 'true'? true: false;
EDIT: the above code is intended for clarity of understanding. In actual use the following code may be more appropriate:
$test_mode_mail = ($string === 'true');
or maybe use of the filter_var function may cover more boolean values:
filter_var covers a whole range of values, including the truthy values "true", "1", "yes" and "on".
Ref : https://bit.ly/33SQ3eP
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