PHP TUTORIALS - PHP Syntax Overview
PHP Syntax Overview
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Escaping to PHP:
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<script language="PHP">...</script>
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Commenting PHP Code:
<?
# This is a comment, and
# This is the second line of the comment
// This is a comment too. Each style comments only
print "An example with single line comments";
?>
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<?
# First Example
print <<<END
This uses the "here document" syntax to output
multiple lines with $variable interpolation. Note
that the here document terminator must appear on a
line with just a semicolon no extra whitespace!
END;
# Second Example
print "This spans
multiple lines. The newlines will be
output as well";
?>
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<?
/* This is a comment with multiline
Author : Mohammad Mohtashim
Purpose: Multiline Comments Demo
Subject: PHP
*/
print "An example with multi line comments";
?>
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PHP is whitespace insensitive:
$four = 2 + 2; // single spaces
$four <tab>=<tab2<tab>+<tab>2 ; // spaces and tabs
$four =
2+
2; // multiple lines
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PHP is case sensitive:
<html>
<body>
<?
$capital = 67;
print("Variable capital is $capital<br>");
print("Variable CaPiTaL is $CaPiTaL<br>");
?>
</body>
</html>
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Variable capital is 67
Variable CaPiTaL is
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Statements are expressions terminated by semicolons:
$greeting = "Welcome to PHP!";
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Braces make blocks:
if (3 == 2 + 1)
print("Good - I haven't totally lost my mind.<br>");
if (3 == 2 + 1)
{
print("Good - I haven't totally");
print("lost my mind.<br>");
}
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Running PHP Script from Command Prompt:
<?php
echo "Hello PHP!!!!!";
?>
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