I am facing a curious situation. I am using CakePHP 2.0 (locally), XAMPP and I wanted to add a simple hit counter in my homepage so I added the following code (very very simple)
<?php
$filename = 'hitcount.txt';
$handle = fopen($filename, 'r');
$hits = trim(fgets($handle)) + 1;
fclose($handle);
$handle = fopen($filename, 'w');
fwrite($handle, $hits);
fclose($handle);
echo $hits;
There is a text file named hitcount.txt which contains the number of hits (everytime I visit the page it should increase the number of hits). It works. The problem appeared when I tried to access the hitcount.txt file. It was empty but the echo of $hits returned the exact result! I deleted the file and it still shows me the expected result! I used a different browser, the same. I deleted CakePHP's cache, no change. I used the same piece of code in another page and it did not complain with some error, returning the expected result.
How is it possible for Cakephp to "see" a file that does not exist? Has it anything to do with Apache?
You probably view the file at the wrong location as CakePHP's. My guess is CakePHP's referring to the file at app/webroot/hitcount.txt.
You might want to define a full path for hitcount.txt so you can be sure that you and CakePHP are both referring to the same location.
<?php
$filename = TMP.'hitcount.txt';
This would locate the file at `app/tmp/hitcount.txt'.
Related
I'm writing a custom helper that extends HtmlHelper and overriding the \HtmlHelper::image() method to calculate the image dimensions and add them as HTML attributes. What I have so far works fine for regular pictures:
public function image($path, $options = array()) {
if (!array_key_exists('width', $options) && !array_key_exists('height', $options)) {
$stamp = Configure::read('Asset.timestamp');
Configure::write('Asset.timestamp', false);
$path = $this->assetUrl($path, $options + array('pathPrefix' => Configure::read('App.imageBaseUrl')));
list($width, $height) = #getimagesize(rtrim(WWW_ROOT, '\\/') . $path);
if (!is_null($width)) {
$options['width'] = $width;
}
if (!is_null($height)) {
$options['height'] = $height;
}
Configure::write('Asset.timestamp', $stamp);
}
return parent::image($path, $options);
}
… but has these flaws:
Pictures from plug-ins can't be located on disk (and they should), e.g.:
echo $this->Html->image('/debug_kit/img/cake.icon.png', array('alt' => 'CakePHP'));
… produces this file system path:
…\src\webroot/debug_kit/img/cake.icon.png
… thus getimagesize() fails because actual location is:
…\src\Plugin\DebugKit\webroot\img\cake.icon.png"
External pictures (which should be ignored) go through the full process:
echo $this->Html->image('http://placekitten.com/200/300');
…\src\webroothttp://placekitten.com/200/300
I've been looking for a builtin method to convert a CakePHP picture URL (in any format accepted by \HtmlHelper::image() into a file system path (o something like null when doesn't apply) but I couldn't find any. Native features that need a disk path, such as \Helper::assetTimestamp() are wrapped in tons of non-reusable code.
Is there an elegant solution?
I'd say that there are pretty much only 3 options:
Submit a patch to add asset filesystem path retrieval functionality to the core.
Copy a lot of code from the helper (assetUrl(), webroot(), and assetTimestamp()).
Use web requests for local URLs (ideally combined with caching).
Try using DS rather than using \ or /, they sometime can cause problems with the OS.
DS is directory separator provided by cakephp Short for PHP’s DIRECTORY_SEPARATOR, which is / on Linux and \ on Windows.
Check the doc
I am just trying to check if an image exists or not, I can do it by using PHP. For example:-
$file = WWW_ROOT .'uploads' . DS . 'employee' . DS .'_'.check.jpg;
$file_exists = file_exists($file);
It's working fine for me. But I have tried also tried using elementExists like this:-
if($this->elementExists("../".$employees->front_image))
{
echo $this->Html->image("../".$employees->front_image); // image output fine without condition.
}
// Here $employees->front_image = uploads/employee/employeename.jpg
This check is not working. How can I do this in CakePHP?
CakePHP is written in PHP, so if you already have a simple solution like file_exists() use that. So you can write something like this:-
if (file_exists(WWW_ROOT . $employees->front_image)):
echo $this->Html->image('../' . $employees->front_image);
endif;
elementExists() is intended for checking that a View element exists, not if files exist in the webroot, so should not be used like you are trying. It does do a file_exists() check, but this scans all available View element paths only.
I think this works in Cake 3 (you should do this in afterFind method IMO):
// Create a new file with 0644 permissions
$file = new File('/path/to/file.php', true, 0644);
if ($file->exists()) {
//do something
}
$file->close();
Your way is checking whether view element exists or not.
This worked for me:
Q: How to check if image exists on remote url or not?
Explanation:
$rfile will take url
$check will open the file with read rights
If file exists then it will print "File exists" else "Doesn't exists".
code:
<?php
// Remote file url
$rFile = 'https://www.example.com/files/test.pdf';
// Open the file
$check = #fopen($rFile, 'r');
// Check if the file exists
if(!$check){
echo 'File does not exist';
}else{
echo 'File exists';
}
?>
I am building a code that lets the user open some files.
reference = warndlg('Choose the files for analysis.');
uiwait(reference);
filenames2 = uigetfile('./*.txt','MultiSelect', 'on');
if ~iscell(filenames2)
filenames2 = {filenames2}; % force it to be a cell array of strings
end
numberOfFiles = numel(filenames2);
data = importdata(filenames2{i},delimiterIn,headerlinesIn);
When I run the code, the prompts show up, I press OK, and then nothing happens. The code just stops, telling me :
Error using importdata (line 137)
Unable to open file.
Error in FreqVSChampB_no_spec (line 119)
data=importdata(filenames2{1},delimiterIn,headerlinesIn);
I just don't have the opportunity to select a file. The cellarray stays empty as showed in the following image.
MATLAB can't find the file that you have selected. Your variable filenames2 contains only the name of the file, not its full path. If you don't provide the full path to importdata, it will search for whatever file name you provide on the MATLAB path, and if it can't find it it will error as you see.
Try something like this - I'm just doing it with single selection for ease of description, but you can do something similar with multiple selection.
[fileName, pathName] = uigetfile('*.txt');
fullNameWithPath = fullfile(pathName, fileName);
importdata(fullNameWithPath)
fullfile is useful, as it inserts the correct character between pathName and fileName (\ on Windows, / on Unix).
You can try to add
pause(0.1);
just after uiwait(reference);
For me it works. In fact I've noticed the active windows changes when we use uiwait and uigetfile.
I am creating an invoice on users desired package selection. The pdf file is being created (but it takes some time), while the code checks for the file. The file exists. Here is the address of the file;
C:/wamp/www/proposal/file/invoice/Basic_52_60.pdf
This is the correct path to the file. I am passing this path to the function in another controller as;
redirect('email/email_invoice/'.$file);
When I tested the file path in email_invoice function, it displayed only c:
c:
The slashes in the path are not transferred. I don't know exactly what is the problem.
CodeIgniter considers each segment of the URL a parameter after the controller and method. So you are essentially passing 7 variables to the Email::email_invoice() method.
You could use some sort of encoding to pass it as one variable and then decode it on the other side such as:
$file = base64_encode($file);
redirect('email/email_invoice/' . $file);
Then in Email.php:
public function email_invoice($file) {
$file = base64_decode($file);
}
Or you could pass it as a get parameter:
redirect('email/email_invoice/?file=' . $file);
public function email_invoice() {
$file = $this->input->get('file');
}
The latter requires the $_GET array to be enabled which it is not by default.
UPDATE - Using Flashdata
Based on some of the comments I thought I would update this answer. base64_encode() can result in characters that will break the URL so you would need to use:
$file = urlencode(base64_encode($file));
redirect('email/email_invoice/' . $file);
And on the other side:
public function email_invoice($file) {
$file = urldecode(base64_decode($file));
}
As the OP pointed out $_GET variables can be manipulated leaving you open to directory traversal attacks or other vulnerabilities. Even if done right you would need extra code for security. Encoding can easily be spotted and altered.
File paths probably shouldn't be carried around in the URL. POST data can be manipulated also even if it is less obvious. Security through obscurity is not security at all. A better approach would be to use flashdata.
$this->session->set_flashdata('email_invoice_pdf', $file);
redirect('email/email_invoice/');
Then in your controller:
public function email_invoice() {
$file = $this->session->flashdata('email_invoice_pdf');
}
That's it. The session was used to carry the file path to the next page request, but after that it is gone.
I have set up a module with custom node type (I called jquizme, after the javascript jQuizMe that I really like using). I set up two fields for the javascript files I need to supply to make it work (after the general jQuizMe-2.2.js file you need to add another two javascript files - one for settings and one for the quiz content).
Drupal saves the files as myjavascriptfile.js.txt - I tested them and they still work to make the jQuizMe interface - ok. the problem is, I want to add these files on the node page... the files will be different for each node. how can I access the files for the drupal_add_js() function so they will load the files for the node in question?
I tried setting up custom field formatters, but I don't know how to access the uri for the files of a given node automatically to put in the drupal_add_js() function (I can add a static file and it loads fine ... I did this with hook_node_view ( jquizme_node_view ).
So I just need a way to access the info for the files... how are they linked to each node? I can't find the connection.
As you probably noticed, I am a module writing newbie, and I probably won't understand much related to object oriented programming sorry, haven;t progressed to that level yet), but I am open to any answer. I am sure I left out important info, but this it already getting too long.
I also set up a special page earlier on to just see if I could get jQuizMe to work in Drupal so that is still in the code.
I have tried many answers (last six hours or so... too much to say here), the latest of which is using tokens, but that is not working. Here is what I have so far:
function jquizme_node_view($node, $view_mode, $langcode) {
switch ($node->type) {
case 'jquizme':
$items = field_get_items('node', $node, 'field_myfield', $node->language);
drupal_add_css(drupal_get_path('module', 'jquizme') . '/jQuizMe.css', >array('scope' => 'header'));
drupal_add_js(drupal_get_path('module', 'jquizme') . '/alert.js');
drupal_add_js(drupal_get_path('module', 'jquizme') . '/jQuizMe-2.2.js', >array('scope' => 'header'));
//drupal_add_js($tokens['node']['jquizme_js1_field'], array('scope' => >'header'));
//drupal_add_js($tokens['node']['jquizme_js2'], array('scope' => 'header'));
break;
}
}
Thanks in advance!
Can you try this?
// Let me assume that the field names of your two file fields
// are jquizme_js1_field and jquizme_js2_field for convenience..
function jquizme_node_view($node, $view_mode, $language) {
$items = field_get_items('node', $node, 'jquizme_js1_field');
_jquizme_add_js_from_filefield($items);
$items = field_get_items('node', $node, 'jquizme_js2_field');
_jquizme_add_js_from_filefield($items);
}
// Given the values of a filefield attached to some entity,
// adds them as JS files to the page.
function _jquizme_add_js_from_filefield($items = array()) {
foreach ($items as $item) {
$fid = &$item['fid'];
$file = file_load($fid);
if (!$file) {
continue; // Maybe the file got deleted..
}
$wrapper = file_stream_wrapper_get_instance_by_uri($file->uri);
$path = $wrapper->realpath();
// Ensure that the path exists and that it is a Javascript file..
if (file_exists($path) && preg_match('\.js$', $path)) {
drupal_add_js($path, array('type' => 'file'));
}
}
}