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all variables begin with a dollar sign - makes string embedding easy
PHP is an ''interpreted language'' (like Perl) and not a ''compiled'' one (like [[Java]] or [[C]]).
PHP is an ''interpreted language'' (like Perl) and not a ''compiled'' one (like [[Java]] or [[C]]).
==String handling==
The [[string concatenation]] operator is the period (or full stop). This is a big difference from most other languages, which use a plus sign or ampersand.
Example:
<code>
$first = "car";
$second = "nation";
$product= $first . $second;
// Equivalent to:
$product= "carnation"
PHP recognizes variable names within strings which are enclosed in double quotes.
Since all variables begin with a dollar sign, it is easy to embed one string inside another. This is the preferred way to create HTML output.
For example:
$first = "John";
$middle = "Quincy"
$last = "Adams";
// Show full name, in bold format
$echo <nowiki>"<B>$first $middle $last</B>";</nowiki>
This outputs <nowiki>"<B>John Quincy Adems</B>"</nowiki> to the HTML page.
==Databases==
==Databases==