Starting PHP

Numbers (integers and real)


<?php
    $a = 1234;
    $b = 0777;
    $c = 0xff;
    $d = 1.25;
    $e = 10e5;
    echo "$a $b $c $d $e<br />\n";
?>

Output

1234 511 255 1.25 1000000

Strings


<?php
    $a = 'can'; $b = 'forms';
    $str1 = 'Let\'s use literals.'; // Single-quoted
    $str2 = "\nEmbeded vars {$a} come in many $b.\n";   // Double-quoted
    $str3 = <<<HEREDOC
we even support Perl like syntax.
HEREDOC;

    echo $str1.nl2br($str2).nl2br($str3);
?>

Output

Let's use literals.
Embeded vars can come in many forms.
we even support Perl like syntax.

Booleans


<?php
    $greeting = True;
    if ($greeting) {
        echo "Hi There!";
        $greeting = FALSE;
    }
?>

Output

Hi There!

Dynamic Typing

• Don't have to declare types

• Automatic conversion done


<?php
    echo 5 + "1.5" + "10e2";
?>

Output

1006.5