form_fields/form_textfield_input_check
Check whether the date entered in a form field of type "textfield" has been formatted correctly.
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<?php
/*
* Form text field input check:
* Check if the date entered in a form field of type "textfield" has been
* formatted correctly.
*
* Create a text field for displaying a date and check if the input has been
* correctly formatted as "mmm dd yyyy, e.g. "Apr 15 2020".
*
* Required software: PDFlib/PDFlib+PDI/PPS 9
* Required data: none
*/
/* This is where the data files are. Adjust as necessary */
$searchpath = dirname(__FILE__,3)."/input";
$outfile = "";
$title = "Form Text Field Input Check";
$width=160; $height=30; $llx = 10; $lly = 700;
try {
$p = new pdflib();
/* This means we must check return values of load_font() etc. */
$p->set_option("errorpolicy=return");
$p->set_option("stringformat=utf8");
$p->set_option("searchpath={" . $searchpath . "}");
if ($p->begin_document($outfile, "") == 0)
throw new Exception("Error: " . $p->get_errmsg());
$p->set_info("Creator", "PDFlib Cookbook");
$p->set_info("Title", $title);
$font = $p->load_font("Helvetica", "winansi", "");
if ($font == 0)
throw new Exception("Error: " . $p->get_errmsg());
$monospaced_font = $p->load_font("Courier", "winansi", "");
if ($monospaced_font == 0)
throw new Exception("Error: " . $p->get_errmsg());
/* Start page */
$p->begin_page_ext(0, 0, " width=a4.width height=a4.height");
/* Adjust the font size to match the field height. Then, descrease the
* font size by e.g. 20% to leave some empty space from the field
* borders.
*/
$ascender = $p->info_font($monospaced_font, "ascender", "fontsize=" .
$height);
$descender = $p->info_font($monospaced_font, "descender", "fontsize=" .
$height);
$fontsize = ($ascender - $descender) * 0.8;
/* For a correct formatting of the date, define a keystroke and a
* formatting action for the date to be checked for compliance to the
* format "mmm dd yyyy".
*/
$keystroke_action = $p->create_action("JavaScript",
"script={AFDate_KeystrokeEx('mmm dd yyyy'); }");
/* Create a form field of type "textfield" called "date" with the
* JavaScript action supplied in the "action" option
*/
$optlist = "backgroundcolor={rgb 0.95 0.95 1} bordercolor={gray 0} " .
"currentvalue={Apr 15 2020} maxchar=11 comb=true " .
"scrollable=false tooltip={Enter a date} font=" . $monospaced_font .
" fontsize=" . $fontsize .
" action={keystroke=" . $keystroke_action . "}";
$p->create_field($llx, $lly, $llx + $width, $lly + $height, "date", "textfield",
$optlist);
$lly-=40;
$p->setfont($font, 12);
$p->fit_textline("Change the date.", $llx, $lly, "");
$p->fit_textline("After pressing \"Enter\", the date is checked to be " .
"correctly formatted as \"mmm dd yyy\".", $llx, $lly-=20, "");
$p->end_page_ext("");
$p->end_document("");
$buf = $p->get_buffer();
$len = strlen($buf);
header("Content-type: application/pdf");
header("Content-Length: $len");
header("Content-Disposition: inline; filename=form_textfield_input_check.pdf");
print $buf;
} catch (PDFlibException $e) {
echo("PDFlib exception occurred:\n".
"[" . $e->get_errnum() . "] " . $e->get_apiname() .
": " . $e->get_errmsg() . "\n");
exit(1);
} catch (Throwable $e) {
echo("PHP exception occurred: " . $e->getMessage() . "\n");
exit(1);
}
$p = 0;
?>