Tag: php

PHP Script to list and display all images in a directory

<?php
 
$path = "./";
$dir_handle = @opendir($path) or die("Unable to open folder");
 
while (false !== ($file = readdir($dir_handle))) {
 
	if (strpos($file,'.jpg') ||strpos($file,'.gif')||strpos($file,'.png')) {
		echo "<img src='$file' alt='$file'><br />";
	}
}
closedir($dir_handle);
 
?>

Demo

Drupal – Pass Data To Template File

Probably most useful for passing large blocks of data that can be iterated over from within the template file. Using this method allows the developer to keep the application logic separate from the presentation layer. The data being passed in would most typically be an array.

1) Create the function that will generate the data block i.e.

function template_preprocess_my_form(&$variables) {
     $data = array("foo" => "bar", "bar" => "foo");
     $variables['template_data'] = $data;
}

The important part is to name your function appropriately so that it will hook the correct form. In this instance the form hook is my_form.

2) Modify hook_theme to accomodate the variable

function my_module_theme() {
    $theme = array(
    'my_form' => array(
            'arguments' => array('form' => NULL,
                                 'template_data' => NULL),
            'template' => 'my_form_template',
        ),
    );
    return $theme;

Here it is important to ensure the array element key matches the variable that was added to the form’s variable array – in this case it is template_data

3) Access the variable you have created in the template file. The variable will available by adding the $ to the variable created in the steps above, in this case $template_data, and it can be used as a normal php variable, i.e.

<?php
foreach ($template_data as $i => $values) :
     echo $template_data[$i]
endforeach;
?>

Simple php ftp download file script example

 
<?php
 
// define some variables
$local_file = '<save-file-as>';
$server_file = '<server-file-name>';
$ftp_user_name='<ftp-user>';
$ftp_user_pass='<ftp-pass>';
$ftp_server='<ftp-host-name>';
// set up basic connection
$conn_id = ftp_connect($ftp_server);
 
// login with username and password
$login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass);
 
/* uncomment if you need to change directories
if (ftp_chdir($conn_id, "<directory>")) {
    echo "Current directory is now: " . ftp_pwd($conn_id) . "\n";
} else { 
    echo "Couldn't change directory\n";
}
*/
 
// try to download $server_file and save to $local_file
if (ftp_get($conn_id, $local_file, $server_file, FTP_BINARY)) {
    echo "Successfully written to $local_file\n";
} else {
    echo "There was a problem\n";
}
 
// close the connection
ftp_close($conn_id);
 
?>

jQuery and php Progressive Form Example

How to use php and jquery to submit a form. This form features progressive enhancement meaning that if the client has javascript disabled the form will still function.

First the form, written in php:

 
<?php
function DisplayForm($values, $errors){
?>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Progressive Enhancement</title>
<meta name="description" content="" />
<meta name="keywords" content="" />
<link rel="stylesheet" href="style.css" type="text/css" media="screen" />
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script type="text/javascript" src="progressive.js"></script> 
</head>
<body>
<div id="contact_form">
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST" id="contact">
 
	<div id="top_message" class="top_message">
	<?php echo (count($errors)>0) ? '<span class="required_show">Please enter required information</span>' : 'Enter Your Information Below' ?>
	</div>
 
	<div class="container">
 
		<div class="spacer" id="spacer">
		&nbsp;
		</div>
 
		<div id="form">
			<div class="row">
			  <span class="label">Name:</span>
			  <span class="input_span"><input size="30" <?php echo (ISSET($errors['name_check'])) ? 'class="missing"' : '' ?> maxlength="30" name="name" id="name" value="<?php echo htmlentities($values['name']) ?>" ></span>
			  <span id="name_error" <?php echo (ISSET($errors['name_check'])) ? 'class="required_show"' : 'class="required_hide"' ?> >(required)</span>
			</div>
 
			<div class="row">
			  <span class="label">Email:</span>
			  <span class="input_span"><input size="30" <?php echo (ISSET($errors['email_check'])) ? 'class="missing"' : '' ?> maxlength="30" name="email" id="email" value="<?php echo htmlentities($values['email']) ?>"></span>
			  <span id="email_error" <?php echo (ISSET($errors['email_check'])) ? 'class="required_show"' : 'class="required_hide"' ?> >(required)</span>
			</div>
 
			<div class="row">
			  <span class="label">Phone:</span>
			  <span class="input_span"><input size="15" <?php echo (ISSET($errors['phone_check'])) ? 'class="missing"' : '' ?> maxlength="15" name="phone" id="phone" value="<?php echo htmlentities($values['phone']) ?>"></span>
			  <span id="phone_error"  <?php echo (ISSET($errors['phone_check'])) ? 'class="required_show"' : 'class="required_hide"' ?> >(required)</span>
			</div>
 
			<div class="row">
			  <span class="submit_span">
			  <input type="image" id="submit" value="submit" name="submit" src="submit.gif" alt="Submit" /></span>
			</div>
		</div>
 
		<div class="spacer" id="spacer">
		&nbsp;
		</div>
 
	</div>
 
</form>
</div>
</body>
</html>
 
<?php
}
 
if ($_SERVER['REQUEST_METHOD'] == 'POST'){
	//$formValues = $_POST;
 
	include ('process.php');
 
	if (count($return_arr)>0){
 
		$formErrors = $return_arr;
 
		if(isset($formErrors['process_check'])){//error occurred processing data
			displaySubmit("Sorry an error occurred, please try again later.");
			exit;
		}
 
		DisplayForm($_POST, $formErrors);
 
	}else{
		//success! no validation or processing errors
		displaySubmit("Thank you for submitting your data.");
	}
 
}else{
	DisplayForm(null, null); //form not submitted - typically when page is loaded 1st time
}
 
?>

Next the php script the handles validation and processing of data:

<?php
//requires php 5.2 or greater
//sleep(2);  // use to mimic delayed response from server
 
if (empty($_POST)){exit;}
 
$return_arr = array();
 
if (isset($_POST['email']) && !isEmail(trim($_POST['email']))){ //validate value posted from email input box
	$return_arr["email_check"] = 'invalid';
}
 
if (isset($_POST['name']) && !isName(trim($_POST['name']))){
	$return_arr["name_check"] = 'invalid';
}
 
if (isset($_POST['phone']) && !isPhone(trim($_POST['phone']))){
	$return_arr["phone_check"] = 'invalid';
}
 
if (count($return_arr) == 0 && !isset($_POST['single_field'])){	//if no validation errors try to process the data and not single field flag set
 
	$process_errors = processData($_POST);
 
	if (!$process_errors){ //mail function returns 1
		$return_arr["process_check"] = 'invalid';
	}
}
 
if(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && ($_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest')){
		//data posted using jquery framework
		echo json_encode($return_arr);
 
	}else{
		//data posted using traditional form post
		return $return_arr;
}
 
function processData($formValues){
 
  $subject = "Contact Information Submitted";
  $message = 'Name: ' . $formValues['name']."\r\n" ;
  $message .= 'Email: ' . $formValues['email']."\r\n" ;
  $message .= 'Phone: ' . $formValues['phone']."\r\n" ;
 
//ini_set("SMTP","smtp.example.com"); //if you are using an smtp server add it here
//return mail("me@example.com", "Subject: $subject", $message, "From: contact-form@example.com");
//return 0; //test fail use this if you dont want to actually send an email while testing
return 1; //test success
}
 
 
//validation functions
function isEmail($email){
	return(preg_match("/^[-_.[:alnum:]]+@((([[:alnum:]]|[[:alnum:]][[:alnum:]-]*[[:alnum:]])\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)$|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i"
			,$email));
}
 
function isPhone($phone){
	return(preg_match( "/(\d)?(\s|-)?(\()?(\d){3}(\))?(\s|-|\.)?(\d){3}(\s|-|\.)?(\d){4}$/"
			,$phone));
}
 
function isName($name){
	return strlen($name) > 2;
}
 
function displaySubmit($message){
 
$data_posted = <<<EOT
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Progressive Enhancement</title>
<meta content="" name="description"/>
<meta content="" name="keywords"/>
<link media="screen" type="text/css" href="style.css" rel="stylesheet">
</link>
</head>
<body>
<div id="contact_form">
<form id="contact">
<div id="top_message" class="top_message error"> </div>
<div class="container">
<div id="spacer" class="spacer">$message</div>
</div>
</form>
</div>
</body>
</html>
EOT;
echo $data_posted;
 
}
 
?>

The jQuery file to process ajax requests:

 
$(document).ready(function(){
 
var bSubmitted = false;
 
	$("#name").focus(); //set focus to first input box
 
 
 
	$("#contact").submit(function(){  //form submitted
		//disable submit button and display loading gif to prevent multiple posts
		$('input[id=submit]', this).attr('disabled', 'disabled');
		$("#submit").attr("src", "loading-ani.gif");
 
		$.post("process.php", $("#contact").serialize(),
		function(data){
			var valid ='true';	//function level variable to track if all inputs on the form passed validation
 
			if (data.phone_check == 'invalid'){
				valid = 'false'; 
				$("#phone").addClass('missing'); 
				$("#phone_error").removeClass('required_hide');
				$("#phone_error").addClass('required_show');
				$("#phone").focus(); 
			} else {
				$("#phone_error").removeClass('required_show');
				$("#phone_error").addClass('required_hide');
				$("#phone").removeClass('missing'); 
			}
 
			if (data.email_check == 'invalid'){
				valid = 'false'; 
				$("#email_error").removeClass('required_hide');
				$("#email_error").addClass('required_show');
				$("#email").addClass('missing'); 
				$("#email").focus();
			} else {
				$("#email_error").removeClass('required_show');
				$("#email_error").addClass('required_hide');
				$("#email").removeClass('missing'); 
			}
 
			if (data.name_check == 'invalid'){
				valid = 'false'; 
				$("#name_error").removeClass('required_hide');
				$("#name_error").addClass('required_show');
				$("#name").addClass('missing'); 
				$("#name").focus(); 
			} else {
				$("#name_error").removeClass('required_show');
				$("#name_error").addClass('required_hide');
				$("#name").removeClass('missing'); 
			}
 
			//re-enable submit button
			$("#submit").removeAttr("disabled");
			$("#submit").attr("src", "submit.gif");
 
			if (valid == 'false'){ 	//if the form contains invalid data notify user else display thank you message	
				$("#top_message").html('Please enter required information');
				$("#top_message").addClass('error'); 
			} else  {  //all form data is valid and has been processed
				$("#form").hide();
				$("#top_message").html('&nbsp;');
					if (data.process_check == 'invalid'){  //processing error
						$("#spacer").html('Sorry an error occurred, please try again later.');
					}else{
						$("#spacer").html('Thank you for submitting your data.');
					}
			}
 
		}, "json");
		//prevent default post behavior
		bSubmitted = true;
		return false; 
 
		});
 
	//single field validation functions - fired on key up event
	$("#name").keyup(function(){
		if (bSubmitted == true){ //only validate after the form has been submitted
			val  =  $(this).val();
		//	val  = $("input#name").val();
			what = 'name';
			SingleValidate(val, what);
			}
		});
 
	$("#email").keyup(function(){
		if (bSubmitted == true){ //only validate after the form has been submitted
			val  = $(this).val();
			what = 'email';
			SingleValidate(val, what);
			}
		});
 
	$("#phone").keyup(function(){
		if (bSubmitted == true){ //only validate after the form has been submitted
			val  = $(this).val();
			what = 'phone';
			SingleValidate(val, what);
			}
		});
 
 
});
 
 
function SingleValidate(val, what) {
 
var dataString = what + '=' + val + '&single_field=yes';//single field = tell process script to only validate data
var error = what + "_check";
 
	$.post("process.php", dataString, function(data){
			if (data[error] == 'invalid'){
				$('#' + [what] + '_error').removeClass('required_hide');
				$('#' + [what] + '_error').addClass('required_show');
				$('#' + what).addClass('missing'); 
			}else{
				$('#' + [what] + '_error').removeClass('required_show');
				$('#' + [what] + '_error').addClass('required_hide');
				$('#' + what).removeClass('missing');
			}
		}, "json");
}

Finally, a style sheet to help with the presentation

input.missing {
 /*background-color: #FFFF77;*/
 border: 2px solid #ff0000;
}
 
div.row {
 clear: both;
 padding-top: 5px;
}
 
div.row span.label {
 float: left;
 width: 100px;
 text-align: right;
  }
 
div.row span.input_span {
 width: 235px;
 text-align: left;
 padding-right: 0px;
 padding-left: 45px;
 
  } 
 
div.row span.submit_span {
 padding-right: 0px;
 padding-left: 145px;
 
  } 
 
div.spacer {
 clear: both;
 }
 
.container{
 width: 425px; 
 background-color: #ccc;
 border: 1px dotted #333;
 padding: 5px 5px 5px 5px; 
 margin: 0px auto;
 }
 
.top_message{ 
 width: 360px; 
 margin: 10px auto;
}
 
.error{
 color: #ff0000;
  }
 
.required_hide{
 color: #ff0000;
 display:none;
} 
 
.required_show{
 color: #ff0000;
 }

See the form in action here.
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