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File: class.dateform.php

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File: class.dateform.php
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Description: The actual class.
Class: Class.DateForm
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Date: 20 years ago
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<?php /** * DateForm Class * Allows you to easily create drop down boxes of the year, month, and day, and keep * track of it via GET/POST. Hours, minutes, and seconds coming soon, as well as * support for SESSION/COOKIE vars. Actually, it has the support for that right now, * just not as beautifully handled as the GET/POST. * * Sample Usage $form = new DateForm(); $form->changeFormNames( 'years', 'starting_year' ); $form->changeFormNames( 'months', 'starting_month' ); $form->changeFormNames( 'days', 'starting_day' ); $form->handlePostVars(); $form->printYears(); $form->printMonths(); $form->printDays(); * @author Jason Lotito <jason@lehighweb.com> * @license LGPL * @version 1.1 - Tuesday, March 05, 2002 12:05:55 PM * @changelog * [[ * Tuesday, March 05, 2002 12:06:12 PM * New functionality - * * Added support for Hours, Minutes, and Seconds * * Added support for languages via setlocale() for display of Months. * * BC There should be no Backwards compatibility issues. * ]] * @todo * [[ * * Add direct support for COOKIES/SESSIONS. * * Add support for dynamic days based on months (optional with JS). * * Any other ideas, suggestions? * ]] */ class DateForm { var $today_info = array(); var $form_names = array( 'years' => 'form_years', 'months' => 'form_months', 'days' => 'form_days', 'hours' => 'form_hours', 'minutes' => 'form_minutes', 'seconds' => 'form_seconds' ); var $current_selections = array(); var $starting_year = '1990'; /** * DateForm * Constructor * * @author Jason Lotito * @email jason@clockmedia.com * @ver DATE */ function DateForm () { $this->today_info = getdate(); } /** * changeFormNames * Used to change the select boxes name attribute. You need to set this * _BEFORE_ using them. Simply call this method, include the type of * element you are changing (years, months, days) and then include the * new name of the element. * * @access public * @param string type The name of the type: years, months, days * @param string value The new name of the given type. * @return bool True on success, False on failure. */ function changeFormNames ( $type, $value ) { $this->form_names[ $type ] = $value; } /** * getToday * Returns whatever information you want about today. Essentially, you give * it a string and it returns you the element. The choices you have are the * same as for the getdate() function. http://www.php.net/getdate * * @access public * @param string today The element to return. * @return string */ function getToday ( $today ) { return $this->today_info[ $today ]; } /** * setStartingYear * Sets the starting year. * The starting year is 1990 by default. You can easily change this here, as * long as the year is above 1600. IIRC, this has something to do with getdate(). * * @access public * @param string year The year you want to start with. * @return bool */ function setStartingYear( $year ) { if ( $year < $this->today_info["year"] && $year >= 1600 ) { $this->starting_year = $year; return true; } return false; } /** * handlePostVars * Maintains state over multiple pages. This allows you to easily set the * currently selected item to be the same thing the person chose the page * before. Works the same way as handleGetVars(), except this handles * values passed by POST. * * Simply Call this value BEFORE display the form elements on the page, and * it will set the selected values as the ones displayed. If you are * displaying multiple elements of each type with different names, this * needs to be called after you reassign the names to match the changes, * but before you display the element. */ function handlePostVars () { global $HTTP_POST_VARS; foreach ( $this->form_names as $name => $form_name ) { if ( ( isset($HTTP_POST_VARS[ $form_name ]) && !empty($HTTP_POST_VARS[ $form_name ]) ) ) { $this->current_selections[$name] = $HTTP_POST_VARS[ $form_name ]; } } } /** * handleGetVars * Maintains state over multiple pages. This allows you to easily set the * currently selected item to be the same thing the person chose the page * before. Works the same way as handlePostVars(), except this handles * values passed by GET. */ function handleGetVars () { global $HTTP_GET_VARS; foreach ( $this->form_names as $name => $form_name ) { if ( ( isset($HTTP_GET_VARS[ $form_name ]) && !empty($HTTP_GET_VARS[ $form_name ]) ) ) { $this->current_selections[$name] = $HTTP_GET_VARS[ $form_name ]; } } } /** * _getMonths * Returns the months in a hash. * * @access private * @return array * @changelog * [[ * Tuesday, March 05, 2002 12:04:10 PM -------------------------------- * Changed to use strftime() instead of date() for the display values * so other languages are supported. * ]] */ function &_getMonths() { for ( $x = 1; $x < 13; $x++ ) { $val[] = date( "m", mktime ( 0,0,0,$x,1,0 ) ); $values[] = strftime ( "%B", mktime ( 0,0,0,$x,1,0 ) ); } $return_array = array( $values, $val ); return $return_array; } /** * getDisplayYears * Returns the HTML to display a select box of years. * * @access public * @param int The number of the year that you can select. This is optional. * @return string Contains the HTML for the select box. */ function getDisplayYears ( $selected_year=false ) { if ( !$selected_year ) { if ( !empty($this->current_selections['years']) ) { $selected_year = $this->current_selections['years']; } else { $selected_year = $this->today_info["year"]; } } $values = $val = range( $this->starting_year, $this->today_info["year"] ); return $this->select( $this->form_names['years'], $values, $val, $selected_year ); } /** * printYears * Prints the years 'select box'. * * @access public * @param int The number of the year that you can select. This is optional. * @return void */ function printYears ( $selected_year=false ) { echo $this->getDisplayYears( $selected_year ); } /** * getDisplayMonths * Returns the HTML to display a select box of months. * * @access public * @param int The number of the month that you can select. This is optional. * @return string Contains the HTML for the select box. */ function getDisplayMonths ( $selected_month=false ) { if ( $selected_month === 0 ) $selected_month = 12; if ( !$selected_month ) { if ( !empty($this->current_selections['months']) ) { $selected_month = $this->current_selections['months']; } else { $selected_month = $this->today_info["mon"]; } } list( $values, $val ) = $this->_getMonths(); return $this->select( $this->form_names['months'], $values, $val, $selected_month ); } /** * printMonths * Prints the month 'select box'. * * @access public * @param int The number of the month that you can select. This is optional. * @return void */ function printMonths ( $selected_month=false ) { echo $this->getDisplayMonths( $selected_month ); } /** * getDisplayDays * Returns the HTML to display a select box of days. Simply defaults to 31 days. * * @access public * @param int The number of the days that you can select. This is optional. * @return string Contains the HTML for the select box. */ function getDisplayDays ( $selected_day=false ) { if ( !$selected_day ) { if ( !empty($this->current_selections['days']) ) { $selected_day = $this->current_selections['days']; } else { $selected_day = $this->today_info["mday"]; } } $values = $val = range( 1, 31 ); return $this->select( $this->form_names['days'], $values, $val, $selected_day ); } /** * printDays * Prints the Days 'select box'. * * @access public * @param int The number of the days that you can select. This is optional. * @return void */ function printDays ( $selected_day=false ) { echo $this->getDisplayDays( $selected_day ); } /** * getDisplayHours * Returns the HTML to display a select box of hours. Simply defaults to * 24 hours. The range used is 0 to 23 hours. * * @access public * @param int The number of the hours that you can select. This is optional. * @return string Contains the HTML for the select box. */ function getDisplayHours ( $selected_hour=false ) { if ( !$selected_hour ) { if ( !empty($this->current_selections['hours']) ) { $selected_hour = $this->current_selections['hours']; } else { $selected_hour = $this->today_info["hours"]; } } $values = $val = range( 0, 23 ); return $this->select( $this->form_names['hours'], $values, $val, $selected_hour ); } /** * printHours * Prints the hours 'select box'. * * @access public * @param int The number of the hour that you can select. This is optional. * @return void */ function printHours ( $selected_hour=false ) { echo $this->getDisplayHours( $selected_hour ); } /** * getDisplayMinutes * Returns the HTML to display a select box of minutes. Simply defaults to * 24 hours. The range used is 60 minutes. * * @access public * @param int The number of the minutes that you can select. This is optional. * @return string Contains the HTML for the select box. */ function getDisplayMinutes ( $selected_minute=false ) { if ( !$selected_minute ) { if ( !empty($this->current_selections['minutes']) ) { $selected_minute = $this->current_selections['minutes']; } else { $selected_minute = $this->today_info["minutes"]; } } $values = $val = range( 0, 59 ); return $this->select( $this->form_names['minutes'], $values, $val, $selected_minute ); } /** * printMinutes * Prints the minutes 'select box'. * * @access public * @param int The number of the minute that you can select. This is optional. * @return void */ function printMinutes ( $selected_minute=false ) { echo $this->getDisplayMinutes( $selected_minute ); } /** * getDisplaySeconds * Returns the HTML to display a select box of seconds. Simply defaults to * 24 hours. The range used is 60 seconds. * * @access public * @param int The number of the seconds that you can select. This is optional. * @return string Contains the HTML for the select box. */ function getDisplaySeconds ( $selected_seconds=false ) { if ( !$selected_seconds ) { if ( !empty($this->current_selections['seconds']) ) { $selected_seconds = $this->current_selections['seconds']; } else { $selected_seconds = $this->today_info["seconds"]; } } $values = $val = range( 0, 59 ); return $this->select( $this->form_names['seconds'], $values, $val, $selected_seconds ); } /** * printSeconds * Prints the seconds 'select box'. * * @access public * @param int The number of the second that you can select. This is optional. * @return void */ function printSeconds ( $selected_seconds=false ) { echo $this->getDisplaySeconds( $selected_seconds ); } /** select $name is the name attribute of the SELECT tag. $values is what is displayed to the user. This can be an array. $val is the VALUE attribute for the OPTION part of the SELECT tag. This is also an array. Each $val[] element correspond to a $values[] element. You do not have to set this, though, if you don't, the $val will equal to the $value For example $val[0] is equal to $values[0] $val[1] is equal to $values[1] $selected_val is the value that is preselected. $multiple supposedly allows you to pick more than one choice, but this has yet to be tested. */ function select($name,$values,$val=FALSE,$selected_val=FALSE) { $content = "\n".'<select name="'.$name.'">'."\n"; $count = 0; $max_count = count($values); while ( $count < $max_count ) { $option = $values[$count]; if (!isset($val[$count])) { $val[$count] = $values[$count]; } if ($selected_val == $val[$count]) { $selected = ' selected="selected"'; } else { $selected = ''; } $val[$count] = str_replace(" ", "_", $val[$count]); $content .= "\t".'<option value="'.$val[$count].'"'.$selected.'>'.$values[$count].'</option>'."\n"; $count++; $selected = ""; } $content .= "\n".'</select>'."\n"; return $content; } } ?>