Mega Code Archive
This PHP function creates dropdown select lists for time and date that you can
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change, outputs a 14 char MySQL timestamp in a text field
Enjoy this - I'm sure it could be more elegant, but I couldn't find something like this anywhere
else. Pull your hair out on more important programming problems! If you like it, or improve
upon it, drop me a line.
call the function like this:
<?PHP
stamper($previous_value);
?>
<?PHP
function stamper($previous_value) {
// your constants
$form_name = "form1";
$store_stamp_field = "datestamp";
// looks for previous 14 char stamp or defaults to now
if (!$previous_value) {
$my_stamp = date("YmdHis");
} else {
$my_stamp = $previous_value;
}
// parses the timestamp & digests it into useful variables
$year=substr($my_stamp,0,4);
$month=substr($my_stamp,4,2);
$day=substr($my_stamp,6,2);
$hour=substr($my_stamp,8,2);
$minute=substr($my_stamp,10,2);
$second=substr($my_stamp,12,2);
// here you can set your ("starting value", "range") for each
$year_range = array("2000","11");
$month_range = array("01","12");
$day_range = array("01","31");
$hour_range = array("00","24");
$minute_range = array("00","60");
$second_range = array("00","60");
$names = array("month","day","year","hour","minute","second");
$names_for_stamp = array("year","month","day","hour","minute","second");
// this drops in some javascript to do the onChange event handler for each select list
echo "<script language=\"JavaScript\">\n";
echo "function adj_timestamp () {\n";
echo "var each_field = new Array(" . count($names) . ");\n";
for ($i=0;$i<count($names);$i++) {
echo "each_field[" . $i . "] = document." . $form_name . "." . $names_for_stamp[$i] . ".options
[document." . $form_name . "." . $names_for_stamp[$i] . ".selectedIndex].value;";
}
echo "var timestamp = ";
for ($i=0;$i<count($names);$i++) {
if ($i!=(count($names)-1)) {
echo "each_field[" . $i . "] + ";
} else {
echo "each_field[" . $i . "];\n";
}
}
echo "document." . $form_name . "." . $store_stamp_field . ".value = timestamp;\n";
echo "}\n";
echo "</script>\n";
// this creates the selects and add the JS event handler
for ($i=0;$i<count($names);$i++) {
echo "<select name=\"$names[$i]\" onChange=\"adj_timestamp();\">\n";
$this_one = ${"$names[$i]" . "_range"};
for ($k=0;$k<$this_one[1];$k++) {
$each_val = $this_one[0]+$k;
if (strlen($each_val)<2) {
$each_val = sprintf("%02d", $each_val);
}
if (${"$names[$i]"}==$each_val) {
$selected=" selected";
} else {
$selected="";
}
echo "<option value=\"$each_val\"$selected>$each_val</option>\n";
}
echo "</select>\n";
}
//this creates the initial timestamp
$the_stamp = $year . $month . $day . $hour . $minute . $second;
//this holds the dynamic timestamp value, make it hidden once you get the hang of how it all
works
echo "<input type=\"text\" name=\"$store_stamp_field\" value=\"$the_stamp\">\n";
}
?>
]]>