Posts tagged Web Programming

HTML 4/XHTML 1.0 Tag List

Jun 21st

Posted by Dennis Thompson in HTML

No comments

DTD referrs to the doc type and indicated which tags are allowed F = Frameset, S = Strict T = Transitional.

Tag Description DTD XHTML 1.1
<!–…–> Comment in HTML FST YES
<!DOCTYPE> Sets document type FST YES
<a> Sets an anchor FST YES
<abbr> Sets an abbreviation FST YES
<acronym> Sets an acronym FST YES
<addres> Sets contact information for the author/owner of a document FST YES
<applet> Deprecated: Sets an embedded applet FT NO
<area /> Sets an area inside an image-map FST NO
<b> Sets bold text FST YES
<base /> Sets a default address or default target for all links on a page FST YES
<basefont /> Deprecated: Sets a default font, color, or size for the text in a page FT NO
<bdo> Sets text direction FST NO
<big> Sets big text FST YES
<blockquote> Sets a long quotation FST YES
<body> Sets a document’s body FST YES
<br /> Sets a single-line break FST YES
<button> Sets a push button FST YES
<caption> Sets a table caption FST YES
<center> Deprecated: Sets center text FT NO
<cite> Sets a citation FST YES
<code> Sets computer code text FST YES
<col /> Sets attribute values for one or more columns in a table  FST NO
<colgroup> Sets a group of columns in a table for formatting FST NO
<dd> Sets a description of a term in a definition list FST YES
<del> Sets deleted text FST NO
<dfn> Sets a definition term FST YES
<dir> Deprecated: Sets a directory list FT NO
<div> Sets a block-level section of a document FST YES
<dl> Sets a definition list FST YES
<dt> Sets a definition term (or item) FST YES
<em> Sets emphasized (or italic) text FST YES
<fieldset> Sets a border around elements in a form FST YES
<font> Deprecated: Sets font, size, and color for text FT NO
<form> Sets a form for user input FST YES
<frame /> Sets a window in a frameset F NO
<frameset> Sets a set of frames F NO
<h1> to <h6> Sets different headings FST YES
<head> Sets the head section of an HTML document FST YES
<hr /> Sets a horizontal line FST YES
<html> Sets an HTML document FST YES
<i> Sets italic (or emphasized) text FST YES
<iframe> Sets an inline frame FT NO
<img /> Sets an image FST YES
<input /> Sets an input field in a form FST YES
<ins> Sets inserted text FST NO
<isindex> Deprecated: Sets a searchable index related to a document FT NO
<kbd> Sets keyboard text FST YES
<label> Sets a label for an input element FST YES
<legend> Sets a legend for a fieldset FST YES
<li> Sets a list item FST YES
<link /> Sets the relationship between a document and an external resource FST YES
<map> Sets an image-map FST NO
<menu> Deprecated: Sets a menu list FT NO
<meta /> Sets metadata about the document FST YES
<noframes> Sets alternative content for users who do not support frames FT NO
<noscript> Sets alternative content for users who do not support client-side scripts e.g. JavaScript FST YES
<object> Sets an embedded object FST YES
<ol> Sets an ordered list FST YES
<optgroup> Sets a group of related options in a form select list FST YES
<option> Sets an option in a form select list FST YES
<p> Sets a paragraph FST YES
<param /> Sets a parameter for an object FST YES
<pre> Sets preformatted text FST YES
<q> Sets a short quotation FST YES
<s> Deprecated: Sets strikethrough text FT NO
<samp> Sets sample computer code FST YES
<script> Sets a script type FST YES
<select> Sets a drop down list FST YES
<small> Sets small text FST YES
<span> Sets a inline-section of a document FST YES
<strike> Deprecated: Sets strikethrough text FT NO
<strong> Sets strong (or bold) text FST YES
<style> Sets an internal style sheet FST YES
<sub> Sets subscript text FST YES
<sup> Sets superscript text FST YES
<table> Sets a table FST YES
<tbody> Groups a table body FST NO
<td> Sets a table cell FST YES
<textarea> Sets a textarea for an input field FST YES
<tfoot> Groups a table footer area FST NO
<th> Sets a table header cell FST YES
<thead> Groups a table header area FST NO
<title> Sets the title of the document FST YES
<tr> Sets a table row FST YES
<tt> Sets teletype text FST YES
<u> Deprecated: Sets underlined text FT NO
<ul> Sets an unorderd list FST YES
<var> Sets a variable part of a text FST YES
<xmp> Deprecated: Sets preformatted text None NO
,

PHP #5: More Loops

Apr 19th

Posted by Jackson Hines in PHP

No comments

There are a few other types of loops in addition to while loops that we learned about in Part 4.

Do-While Loop

A do-while loop is very similar to a while loop. The only difference is that the condition is evaluated after each loop iteration, rather than before. The syntax is like this:

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do {
  // some code here
} while (condition)

Since the condition isn’t evaluated until after the loop body, the loop body is always executed at least once, whether or not the condition is true. Once it does get to the condition, if it is true, it goes back up to the top of the loop body. If it is false, the loop terminates.

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$i = 11;
do {
   print "The number is $i<br />";
   ++$i;
} while ($i <= 10)

The above code prints:

The number is 11<br />

even though the condition is not true. The loop body always executes once.

For Loop

The for loop is a bit more complicated. The syntax looks like this:

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for (initial-expression; condition; loop-end-expression) {
  //some code goes here
}

The initial-expression is evaluated only once, at the very beginning of the loop. The condition is then evaluated. If the condition is true, the body of the loop executes. Then the loop-end-expression is run. The process then starts over again with evaluating the condition. A for loop is generally used to do simple bounding loops, like this:

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for ($i = 1; $i <= 10; ++$i) {
   print "The number is $i<br />"
}

As you’ll notice, the same exact thing can be done with a while loop, but many prefer the for loop as it is more compact:

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$i = 1;
while ($i <= 10) {
   print "The number is $i<br />";
   ++$i;
}

More Looping Examples

Let’s try using a for loops to create a multiplication table.

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$start = 1;
$end = 10;

print '<table border="1" cellspacing="0" cellpadding="5">';
for ($y = $start - 1; $y <= $end; ++$y) {
    print "<tr>";
    for ($x = $start - 1; $x <= $end; ++$x) {
        if ($y == $start - 1) {
            print "<td><b>$x</b></td>";
           
        } else if ($x == $start - 1) {
            print "<td><b>$y</b>";
        } else {
            print "<td>"
            print $x*$y;
            print "</td>";
        }
    }
    print "</tr>";
}
print "</table>";

Notice that there is a for loop inside of another for loop. Trace the above code carefully to see how it works. This code will produce the following table:

0 1 2 3 4 5 6 7 8 9 10
1 1 2 3 4 5 6 7 8 9 10
2 2 4 6 8 10 12 14 16 18 20
3 3 6 9 12 15 18 21 24 27 30
4 4 8 12 16 20 24 28 32 36 40
5 5 10 15 20 25 30 35 40 45 50
6 6 12 18 24 30 36 42 48 54 60
7 7 14 21 28 35 42 49 56 63 70
8 8 16 24 32 40 48 56 64 72 80
9 9 18 27 36 45 54 63 72 81 90
10 10 20 30 40 50 60 70 80 90 100

PHP Video Tutorial 8: Comparison and Logical Operators

Dec 27th

Posted by Jackson Hines in PHP Video

1 comment

PHP Video Tutorial 7: If-Else Statements

Dec 27th

Posted by Jackson Hines in PHP Video

2 comments

PHP Video Tutorial 6: Newlines in Strings

Dec 27th

Posted by Jackson Hines in PHP Video

No comments

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