<\/span><\/h2>\n\n\n\nAfter knowing what PHP is and its functions, let’s look at the basic syntax used in compiling PHP algorithms and data structures. Each programming language has different writing rules, as well as PHP.<\/p>\n\n\n\n
The basic syntax starts with <?php and ends with ?>. Command variables in PHP end with a semicolon symbol;<\/p>\n\n\n\n
Here’s an example of writing basic PHP syntax:<\/p>\n\n\n
[sourcecode lang=”PHP”] <?php<\/span><\/p>\n
echo "Welcome to Sagara";<\/span><\/p>\n?> [\/sourcecode]<\/p>\n\n\n\n<\/p>\n\n\n\n
Here’s an explanation of the code:<\/p>\n\n\n\n
- <?PHP is a mandatory code to open a PHP program<\/li>
- echo is a command to display the text<\/li>
- \u201cWelcome to \u00a0Sagara”; is the text to be displayed and written between quotation marks and ending with a semicolon<\/li>
- ?> is a code to end a PHP program and is used when combined with other programming languages<\/li><\/ul>\n\n\n\n
<\/span>Variables are case-sensitive<\/strong><\/span><\/h2>\n\n\n\nIt should be noted that the command variables in PHP are case-sensitive. That is, the use of uppercase and lowercase letters is very influential on the given output. As an example:<\/p>\n\n\n\n
[sourcecode lang=\u201dPHP\u201d] <?PHP<\/p>\n\n\n\n
$name = “Sagara”;<\/p>\n\n\n\n
echo $name;<\/p>\n\n\n\n
>? [\/source code]<\/p>\n\n\n\n
The above syntax will produce the output: Sagara on the web page. However, if you write it like this:<\/p>\n\n\n\n
[sourcecode lang=\u201dPHP\u201d] <?php<\/p>\n\n\n\n
$name = “Sagara”;<\/p>\n\n\n\n
echo $Name;<\/p>\n\n\n\n
>? [\/source code]<\/p>\n\n\n\n
Then the display will be an error because there is a difference in capital letters in the $Name and $name variables. <\/p>\n\n\n\n
If the variables you write have differences, such as capital letters, the display will be an error. <\/p>\n\n\n\n
Here are some PHP regulatory variables quoted from FreeCodeCamp:<\/p>\n\n\n\n
- PHP variables start with the dollar symbol ($)<\/li>
- To assign a value to a PHP variable use the sign ( = )<\/li>
- Variable names can only begin with an uppercase letter, lowercase letter, or the underscore symbol ( _ )<\/li>
- Variable names can only contain letters, numbers, and underscores (A-z, 0-9, and _). Other characters like + \u2013 %. & ( ) not applicable.<\/li>
- PHP variables are case-sensitive. Example: $Name and $name are two different variables.<\/li>
- It has predefined system variables that are predefined systemically from PHP, so you shouldn’t create variables with the same name. For example, $GLOBALS , $_SERVER , $_GET , $_POST, $php_errormsg, $http_response_header, $argc, $argv, $this.<\/li><\/ul>\n\n\n\n