As in C or Perl, PHP requires instructions to be terminated with a semicolon at the end of each statement. The closing tag of a block of PHP code automatically implies a semicolon; you do not need to have a semicolon terminating the last line of a PHP block. The closing tag for the block will include the immediately trailing newline if one is present.
Example #1 Example showing the closing tag encompassing the trailing newline
No newline
The above example will output:
Some textNo newline But newline now
Examples of entering and exiting the PHP parser:
if you no more html to write after the code.
M1001 ¶
3 months ago
You are also able to write more than one statement in one line, just separating with a semicolon, example:
anisgazig at gmail dot com ¶
2 years ago
At the end of each statement,we will use a semicolon to seperate each statement.Php closing tag autometically implies a semiclon.So last line of a statment do not require a statement.
Closing tag is optional and some cases omitting the closing tag is very helpful.
1.using include or require function
2.unwanted whitespace will not occur at the end of file
3.add header any time
View the example [with default tag syntax] in the browser.
Short open Tags
The short tags starts with "". Short style tags are only available when they are enabled in php.ini configuration file on servers.
Example:
Omit the PHP closing tag at the end of the file
It is recommended that a closing PHP tag shall be omitted in a file containing only PHP code so that occurrences of accidental whitespace or new lines being added after the PHP closing tag, which may start output buffering causing uncalled for effects can be avoided.
Example:
In the above example, both semicolon[;] and a closing PHP tag are present.
In the above example, there is no semicolon[;] after the last
instruction but a closing PHP tag is present.
Output:
We are learning PHP case sensitivity We are learning PHP case sensitivity We are learning PHP case sensitivity
View the example in the browser
On the other hand, all variables are case-sensitive.
Consider the following example. Only the first statement display the value as $amount because $amount, $AMOUNT, $amoUNT are three different variables.
Example - 2
Output:
The Amount is : 200 The Amount is : The Amount is :
View the example in the browser
PHP whitespace insensitivity
In general, whitespace is not visible on the screen, including spaces, tabs, and end-of-line characters i.e. carriage returns. In PHP whitespace doesn't matter in coding. You can break a single line statement to any number of lines or number of separate statements together on a single line.
The following two examples are same :
Example:
Output:
The Name of student is : David Rayy His Class is : V and Roll No. is 12
View the example in the browser
Example: Advance whitespace insensitivity
Output:
The Name of student is : David Rayy His Class is : V and Roll No. is 12
View the example in the browser
Example : Whitespace insensitivity with tabs and spaces
In the following example spaces and tabs are used in a numeric operation, but in both cases, $xyz returns the same value.
Output:
23 23
View the example in the browser
PHP: Single line and Multiple lines Comments
Single line comment
PHP supports the following two different way of commenting.
# This is a single line comment.
//This is another way of single line comment.
Example:
Output:
How to make single line comment.
View the example in the browser
Multiple lines comments
PHP supports 'C', style comments. A comment starts with the character pair /* and terminates with the character pair */.
/* This is a multiple comment testing,
and these lines will be ignored
at the time of execution */
Example:
Output:
How to make multiline comments
View the example in the browser
Multiple lines comments can not be nested
First PHP Script
Here is the first PHP script which will display "Hello World..." in the web browser.
The tags tell the web server to treat everything inside the tags as PHP code to run. The code is very simple. It uses an in-build PHP function "echo" to display the text "Hello World ..." in the web page. Everything outside these tags is sent directly to the browser.
Pictorial presentation
Combining PHP and HTML
PHP syntax is applicable only within PHP tags.
PHP can be embedded in HTML and placed anywhere in the document.
When PHP is embedded in HTML documents and PHP parses this document it interpreted the section enclosed with an opening tag [] of PHP and ignore the rest parts of the document.
PHP and HTML are seen together in the following example.
PHP Page
Practice here online :
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