PHP Syntax & Comments
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This document summarizes basic syntax, comments, and print/echo statements in PHP. It discusses PHP tags like <?php ?> and <? ?>, and comments using // for single-line and /* */ for multi-line. It notes that PHP is whitespace insensitive but case sensitive. It also introduces the echo and print statements as ways to output text in PHP code.
PHP Syntax & Comments
- 1. Basic Syntax , Comment & Echo / Print Statement in PHP Part-II Presented By: Sidrah Altaf Vocational Training Centre Saddar Karachi
- 2. PHP Tags: Canonical PHP tags: The most universally effective PHP tag style is: <?php Content goes here…. ?>
- 3. PHP Tags: Short open (SGML-style) tags: If you use this style, you can be positive that your tags will always be correctly interpreted. <? Content goes here…. ?>
- 4. PHP Tags: ASP Style tags: ASP-style tags mimic the tags used by Active Server Pages to delineate code blocks. ASP- style tags look like this: <% PHP Content goes here…. %>
- 5. PHP Tags: HTML Style tags: HTML script tags look like this: <script language=“PHP”> PHP Content goes here…. </script>
- 6. PHP Comments: A comment is the portion of a program that exists only for the human reader and stripped out before displaying the programs result. There are two commenting formats in PHP: Single Line Comment Multi Line Comment
- 7. Single Line Comments: They are generally used for short explanations or notes relevant to the local code. Here are the examples of single line comments. <?php // This is single line comment ?>
- 8. Multi Line Comments: They are generally used to provide pseudo code algorithms and more detailed explanations when necessary. The multiline style of commenting is the same as in C. Here are the example of multi lines comments. <?php /* This is Multi line comment */ ?>
- 9. PHP is White space in-sensitive: Whitespace is the stuff you type that is typically invisible on the screen, including spaces, tabs, and carriage returns (end-of-line characters). PHP whitespace insensitive means that it almost never matters how many whitespace characters you have in a row.one whitespace character is the same as many such characters.
- 10. PHP is case-sensitive: Normally PHP is a case-sensitive language. But in PHP, all keywords for e.g. (if, else, while, echo),classes , functions, are not case sensitive.
- 11. First PHP Code (Echo Statement):
- 12. First PHP Code (Print Statement):
- 13. THANK YOU