Functions to build HTML forms.

I've created this for another project of mine, and think they come in useful
here. They are kept simple on purpose. Advantage is less typing
[eg addHidden('startMessage', $startMessage)] and everything is encoded
automatically. Could be extended with submit/reset and other form elts
not covered yet.

functions/forms.php

@@ -0,0 +1,124 @@
+<?php
+/**
+ * forms.php
+ *
+ * Copyright (c) 2004 The SquirrelMail Project Team
+ * Licensed under the GNU GPL. For full terms see the file COPYING.
+ *
+ * Functions to build HTML forms in a safe and consistent manner.
+ * All name, value attributes are htmlentitied.
+ *
+ * $Id$
+ * @package squirrelmail
+ */
+
+/**
+ * Helper function to create form fields, not to be called directly,
+ * only by other functions below.
+ */
+function addInputField($type, $name, $value, $attributes = '') {
+    return '<input type="'.$type.'" name="'.htmlentities($name).'" '.
+        ' value="'.htmlentities($value).'"'.
+        $attributes . ">\n";
+}
+
+
+/**
+ * Form checkbox
+ */
+function addCheckBox($name, $checked = false, $value='') {
+    return addInputField('checkbox', $name, $value,
+        ($checked ? ' checked' : ''));
+}
+
+/**
+ * Form radio box
+ */
+function addRadioBox($name, $checked = false, $value='') {
+    return addInputField('radio', $name, $value, 
+        ($checked ? ' checked' : ''));
+}
+
+/**
+ * A hidden form field.
+ */
+function addHidden($name, $value) {
+    return addInputField('hidden', $name, $value);
+}
+
+/**
+ * An input textbox.
+ */
+function addInput($name, $value = '', $size = 0, $maxlength = 0) {
+
+    $attr = '';
+    if ($size) {
+        $attr.= ' size="'.(int)$size.'"';
+    }
+    if ($maxlength) {
+        $attr.= ' maxlength="'.(int)$maxlength .'"';
+    }
+
+    return addInputField('text', $name, $value, $attr);
+}
+
+
+/**
+ * Function to create a selectlist from an array.
+ * Usage:
+ * name: html name attribute
+ * values: array ( key => value )  ->     <option value="key">value
+ * default: the key that will be selected
+ * usekeys: use the keys of the array as option value or not
+ */
+function addSelect($name, $values, $default = null, $usekeys = false)
+{
+    // only one element
+    if(count($values) == 1) {
+        $k = key($values); $v = array_pop($values);
+        return addHidden($name, ($usekeys ? $k:$v)).
+            htmlentities($v) . "\n";
+    }
+
+    $ret = '<select name="'.htmlentities($name) . "\">\n";
+    foreach ($values as $k => $v) {
+        if(!$usekeys) $k = $v;
+        $ret .= '<option value="' .
+            htmlentities( $k ) . '"' .
+            (($default == $k) ? ' selected':'') .
+            '>' . htmlentities($v) ."</option>\n";
+    }
+    $ret .= "</select>\n";
+
+    return $ret;
+}
+
+/**
+ * Textarea form element.
+ */
+function addTextArea($name, $text = '', $cols = 40, $rows = 10, $attr = '') {
+    return '<textarea name="'.htmlentities($name).'" '.
+        'rows="'.(int)$rows .'" cols="'.(int)$cols.'"'.
+        $attr . '">'.htmlentities($text) ."</textarea>\n";
+}
+
+/**
+ * Make a <form> start-tag.
+ */
+function addForm($action, $method = 'POST', $name = '', $enctype = '', $charset = '')
+{
+    if($name) {
+        $name = ' name="'.$name.'"';
+    }
+    if($enctype) {
+        $enctype = ' enctype="'.$enctype.'"';
+    }
+    if($charset) {
+        $charset = ' accept-charset="'.htmlspecialchars($charset).'"';
+    }
+
+    return '<form action="'. $action .'" method="'. $method .'"'.
+        $enctype . $name . $charset . "\">\n";
+}
+
+