lately I have upgraded my Eloquent to the latest version and the pagination stoped working. Basically when I call the links(), in the twig, to print the pagination I'm getting the following error message
Fatal error: Uncaught Error: Call to a member function make() on null in /Applications/XAMPP/xamppfiles/htdocs/*****/public_html/wp-content/plugins/crm/vendor/illuminate/pagination/LengthAwarePaginator.php:140
Stack trace: #0 /Applications/XAMPP/xamppfiles/htdocs/*****/public_html/wp-content/plugins/crm/vendor/illuminate/pagination/LengthAwarePaginator.php(119): Illuminate\Pagination\LengthAwarePaginator->render(NULL)
#1 /Applications/XAMPP/xamppfiles/htdocs/*****/public_html/wp-content/plugins/crm/app/Providers/CMSServiceProvider.php(115): Illuminate\Pagination\LengthAwarePaginator->links()
#2 /Applications/XAMPP/xamppfiles/htdocs/*****/public_html/wp-content/twig-cache/18/189d0df44f1fe623fdad2b6fb631c15897dda3614de070c872657111c85f5f1a.php(333): Herbert\Framework\Application->{closure}(Object(Illuminate\Pagination\LengthAwarePaginator))
#3 /Applications/XAMPP/xamppfiles/htdocs/*****/public_html/wp-content/plugins/properties-integration/ in /Applications/XAMPP/xamppfiles/htdocs/*****/public_html/wp-content/plugins/crm/vendor/illuminate/pagination/LengthAwarePaginator.php on line 140
Then if I do dd($clients->links()) inside my controller I'm getting the following error message
Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in /Applications/XAMPP/xamppfiles/htdocs/*****/public_html/wp-content/plugins/crm/vendor/illuminate/pagination/AbstractPaginator.php on line 377
but if I do dd($clients) I'm getting the Eloquent object with the selected records and the current page.
Here are the links of the classes
https://github.com/illuminate/pagination/blob/5.3/LengthAwarePaginator.php#L140-L143
https://github.com/illuminate/pagination/blob/master/AbstractPaginator.php#L405-L424
UPDATE
I did a temporary solution which basically I used the available functions of the AbstractPaginator. If anyone has a better approach please feel free to post it.
$function = new Twig_SimpleFunction("render", function ($object) {
$html = '';
$data = array(); // start out array
$data['pages'] = ceil($object->total() / $object->perPage()); // calc pages
$data['si'] = ($object->currentPage() * $object->perPage()) - $object->perPage(); // what row to start at
$data['curr_page'] = $object->currentPage(); // Whats the current page
$max = 7;
if ($data['curr_page'] < $max) {
$sp = 1;
} elseif ($data['curr_page'] >= ($data['pages'] - floor($max / 2))) {
$sp = $data['pages'] - $max + 1;
} elseif ($data['curr_page'] >= $max) {
$sp = $data['curr_page'] - floor($max / 2);
}
if ($data['curr_page'] > $max) {
$html .= '<li >First Page</li>';
}
for ($i = $sp; $i <= ($sp + $max - 1); $i++) {
if ($i > $data['pages']) {
continue;
}
if ($object->currentPage() == $i) {
$html .= ' <li class="active">';
} else {
$html .= '<li >';
}
$html .= ' ' . $i . '
</li>';
}
if ($data['curr_page'] < ($data['pages'] - floor($max / 2))) {
$html .= '<li >Last Page</li>';
}
return $html;
});
Related
I'd like to learn about neural nets starting with the very basic perceptron algorithm. So I've implemented one in PHP and I'm getting weird results after training it. All the 4 possible input combinations return either wrong or correct results (more often the wrong ones).
1) Is there something wrong with my implementation or the results I'm getting are normal?
2) Can this kind of implementation work with more than 2 inputs?
3) What would be the next (easiest) step in learning neural nets after this? Maybe adding more neurons, changing the activation function, or ...?
P.S. I'm pretty bad at math and don't necessarily understand the math behind perceptron 100%, at least not the training part.
Perceptron Class
<?php
namespace Perceptron;
class Perceptron
{
// Number of inputs
protected $n;
protected $weights = [];
protected $bias;
public function __construct(int $n)
{
$this->n = $n;
// Generate random weights for each input
for ($i = 0; $i < $n; $i++) {
$w = mt_rand(-100, 100) / 100;
array_push($this->weights, $w);
}
// Generate a random bias
$this->bias = mt_rand(-100, 100) / 100;
}
public function sum(array $inputs)
{
$sum = 0;
for ($i = 0; $i < $this->n; $i++) {
$sum += ($inputs[$i] * $this->weights[$i]);
}
return $sum + $this->bias;
}
public function activationFunction(float $sum)
{
return $sum < 0.0 ? 0 : 1;
}
public function predict(array $inputs)
{
$sum = $this->sum($inputs);
return $this->activationFunction($sum);
}
public function train(array $trainingSet, float $learningRate)
{
foreach ($trainingSet as $row) {
$inputs = array_slice($row, 0, $this->n);
$correctOutput = $row[$this->n];
$output = $this->predict($inputs);
$error = $correctOutput - $output;
// Adjusting the weights
$this->weights[0] = $this->weights[0] + ($learningRate * $error);
for ($i = 0; $i < $this->n - 1; $i++) {
$this->weights[$i + 1] =
$this->weights[$i] + ($learningRate * $inputs[$i] * $error);
}
}
// Adjusting the bias
$this->bias += ($learningRate * $error);
}
}
Main File
<?php
require_once 'vendor/autoload.php';
use Perceptron\Perceptron;
// Create a new perceptron with 2 inputs
$perceptron = new Perceptron(2);
// Test the perceptron
echo "Before training:\n";
$output = $perceptron->predict([0, 0]);
echo "{$output} - " . ($output == 0 ? 'correct' : 'nope') . "\n";
$output = $perceptron->predict([0, 1]);
echo "{$output} - " . ($output == 0 ? 'correct' : 'nope') . "\n";
$output = $perceptron->predict([1, 0]);
echo "{$output} - " . ($output == 0 ? 'correct' : 'nope') . "\n";
$output = $perceptron->predict([1, 1]);
echo "{$output} - " . ($output == 1 ? 'correct' : 'nope') . "\n";
// Train the perceptron
$trainingSet = [
// The 3rd column is the correct output
[0, 0, 0],
[0, 1, 0],
[1, 0, 0],
[1, 1, 1],
];
for ($i = 0; $i < 1000; $i++) {
$perceptron->train($trainingSet, 0.1);
}
// Test the perceptron again - now the results should be correct
echo "\nAfter training:\n";
$output = $perceptron->predict([0, 0]);
echo "{$output} - " . ($output == 0 ? 'correct' : 'nope') . "\n";
$output = $perceptron->predict([0, 1]);
echo "{$output} - " . ($output == 0 ? 'correct' : 'nope') . "\n";
$output = $perceptron->predict([1, 0]);
echo "{$output} - " . ($output == 0 ? 'correct' : 'nope') . "\n";
$output = $perceptron->predict([1, 1]);
echo "{$output} - " . ($output == 1 ? 'correct' : 'nope') . "\n";
I must thank you for posting this question, I have wanted a chance to dive a little deeper into neural networks. Anyway, down to business. After tinkering around and verbose logging what all is happening, it ended up only requiring 1 character change to work as intended:
public function sum(array $inputs)
{
...
//instead of multiplying the input by the weight, we should be adding the weight
$sum += ($inputs[$i] + $this->weights[$i]);
...
}
With that change, 1000 iterations of training ends up being overkill.
One bit of the code was confusing, different setting of weights:
public function train(array $trainingSet, float $learningRate)
{
foreach ($trainingSet as $row) {
...
$this->weights[0] = $this->weights[0] + ($learningRate * $error);
for ($i = 0; $i < $this->n - 1; $i++) {
$this->weights[$i + 1] =
$this->weights[$i] + ($learningRate * $inputs[$i] * $error);
}
}
I don't necessarily understand why you chose to do it this way. My unexperienced eye would think that the following would work as well.
for ($i = 0; $i < $this->n; $i++) {
$this->weight[$i] += $learningRate * $error;
}
Found my silly mistake, I wasn't adjusting the bias for each row of a training set as I accidentally put it outside the foreach loop. This is what the train() method should look like:
public function train(array $trainingSet, float $learningRate)
{
foreach ($trainingSet as $row) {
$inputs = array_slice($row, 0, $this->n);
$correctOutput = $row[$this->n];
$output = $this->predict($inputs);
$error = $correctOutput - $output;
// Adjusting the weights
for ($i = 0; $i < $this->n; $i++) {
$this->weights[$i] += ($learningRate * $inputs[$i] * $error);
}
// Adjusting the bias
$this->bias += ($learningRate * $error);
}
}
Now I get the correct results after training each time I run the script. Just 100 epochs of training is enough.
I have this array which contain around 1000 records. I want to display 20 array records per page.
$list=array(
array([title]=>"sony", [description]=>"camera"),
array([title]=>"sony", [description]=>"mobiles"),
array([title]=>"lenovo", [description]=>"laptop"),
array([title]=>"lenovo", [description]=>"mobiles")
);
I have used the following code for pagination. It is giving me a long row for pagination. Can someone help me to include previous and next code to my existing code so that my pagination will look good.
$page = isset($_REQUEST['page']) && $_REQUEST['page'] > 0 ? $_REQUEST['page'] : 1;
function display($list, $page = 1)
{
$start = ($page - 1) * 2;
$list = array_slice($list, $start, 15);
foreach ($list as $key => $val) {
echo $val['title'] . '<br/>';
echo $val['description'] . '<br/>';
echo "<br>";
}} $len = count($list);
$pages = ceil($len / 2);
if ($page > $pages or $page < 1)
{
echo 'page not found';
}
else
{
display($list, $page);
for ($i = 1 ; $i <= $pages ; $i++)
{
$current = ($i == $page) ? TRUE : FALSE;
if ($current) {
echo '<b>' . $i . '</b>';
}
else
{
?>
<?php echo $i;?>
<?php
}
}
}
Here's an example with the data array from your question.
The example
The page size is assumed to be 2 (20 in your question).
The size of the data array does not matter.
The start parameter is provided (as in your example) thru a GET parameter http://localhost/flipkart-api/fkt_offer.php?…start=index_or_page. This parameter is available in the script as $_GET['start'].
The previous and next start indices are to be calculated ($start +/- $maxpage, etc.).
To keep this example simple, I took the start index, not the page number, as parameter. But you also could use a page number and calculate the index, of course.
For the reason of brevity I omitted error checking ("what if no more items", etc.).
Code:
<?php
// The data array
$list=array(
array('title'=>"sony", 'description'=>"camera"),
array('title'=>"sony", 'description'=>"mobiles"),
array('title'=>"lenovo", 'description'=>"laptop"),
array('title'=>"lenovo", 'description'=>"mobiles")
);
// Evaluate URL
$proto = ((isset($_SERVER["HTTPS"])) && (strtoupper($_SERVER["HTTPS"]) == 'ON')) ? "https://" : "http://";
$hname = getenv("SERVER_NAME");
$port = getenv("SERVER_PORT");
if ( (($port==80)&&($proto=='http://')) || (($port==443)&&($proto=='https://')) ) { $port = ''; }
$params = '';
foreach ($_GET as $key=>$value) {
if (strtolower($key)=='start') continue;
$params .= (empty($params)) ? "$key=$value" : "&$key=$value";
}
$url = $proto . $hname . $port. $_SERVER['SCRIPT_NAME'] . '?' . $params;
// Page contents
$last = count($list)-1;
$start = (isset($_GET['start'])) ? intval($_GET['start']) : 0;
if ($start<0) $start = 0; if ($start > $last) $start = $last;
$maxpage = 2;
echo "<p>Start index = $start</p>" . PHP_EOL;
$curpage = 0;
for($xi=$start; $xi<=$last; $xi++) {
if ($curpage >= $maxpage) break;
$curpage++;
echo 'Entry ' . $curpage .
': ' . $list[$xi]['title'] .
' - ' . $list[$xi]['description'] .
'<br />' . PHP_EOL;
}
// Navigation
$prev = $start - $maxpage; if ($prev<0) $prev = 0;
$next = ( ($start+$maxpage) > $last) ? $start : $start + $maxpage;
$prev = ( ($start-$maxpage) < 0) ? 0 : $start - $maxpage;
echo '<p>Previous ';
echo 'Next</p>';
?>
Result (e.g)
Start index = 2
Entry 1: lenovo - laptop
Entry 2: lenovo - mobiles
Previous Next
This question already has answers here:
PHP Fatal error: Using $this when not in object context
(9 answers)
Closed 7 years ago.
I have the below function, But when I run the code make error like:
Fatal error: Using $this when not in object context in E:....
How to fix it. I replace $this-> with self:: but it failed too.
Please help in this regards,
<?php
function cehck_files()
{
$file1 = 'C:\xampp\htdocs\test\test1.php';
$file2 = 'C:\xampp\htdocs\test\test2.php';
$test = $this->compareFiles($file1,$file2,true);
$test_display = $this->toTable($test);
echo "<pre>";
print_r($test_display);
print_r($test);
echo "</pre>";
}
function compareFiles($file1, $file2, $compareCharacters = false) {
return $this->compare(file_get_contents($file1),file_get_contents($file2),$compareCharacters);
}
function compare($string1, $string2, $compareCharacters = false) {
$start = 0;
if ($compareCharacters){
$sequence1 = $string1;
$sequence2 = $string2;
$end1 = strlen($string1) - 1;
$end2 = strlen($string2) - 1;
} else {
$sequence1 = preg_split('/\R/', $string1);
$sequence2 = preg_split('/\R/', $string2);
$end1 = count($sequence1) - 1;
$end2 = count($sequence2) - 1;
}
// skip any common prefix
while ($start <= $end1 && $start <= $end2 && $sequence1[$start] == $sequence2[$start]) {
$start ++;
}
// skip any common suffix
while ($end1 >= $start && $end2 >= $start && $sequence1[$end1] == $sequence2[$end2]) {
$end1 --;
$end2 --;
}
// compute the table of longest common subsequence lengths
$table = self::computeTable($sequence1, $sequence2, $start, $end1, $end2);
// generate the partial diff
$partialDiff =
self::generatePartialDiff($table, $sequence1, $sequence2, $start);
// generate the full diff
$diff = array();
for ($index = 0; $index < $start; $index ++){
$diff[] = array($sequence1[$index], UNMODIFIED);
}
while (count($partialDiff) > 0) $diff[] = array_pop($partialDiff);
for ($index = $end1 + 1; $index < ($compareCharacters ? strlen($sequence1) : count($sequence1)); $index ++) {
$diff[] = array($sequence1[$index], UNMODIFIED);
}
// return the diff
return $diff;
}
function computeTable($sequence1, $sequence2, $start, $end1, $end2) {
$length1 = $end1 - $start + 1;
$length2 = $end2 - $start + 1;
// initialise the table
$table = array(array_fill(0, $length2 + 1, 0));
// loop over the rows
for ($index1 = 1; $index1 <= $length1; $index1 ++) {
// create the new row
$table[$index1] = array(0);
// loop over the columns
for ($index2 = 1; $index2 <= $length2; $index2 ++){
// store the longest common subsequence length
if ($sequence1[$index1 + $start - 1] == $sequence2[$index2 + $start - 1]) {
$table[$index1][$index2] = $table[$index1 - 1][$index2 - 1] + 1;
} else {
$table[$index1][$index2] =
max($table[$index1 - 1][$index2], $table[$index1][$index2 - 1]);
}
}
}
// return the table
return $table;
}
function generatePartialDiff( $table, $sequence1, $sequence2, $start ) {
$diff = array();
// initialise the indices
$index1 = count($table) - 1;
$index2 = count($table[0]) - 1;
// loop until there are no items remaining in either sequence
while ($index1 > 0 || $index2 > 0){
// check what has happened to the items at these indices
if ($index1 > 0 && $index2 > 0 && $sequence1[$index1 + $start - 1] == $sequence2[$index2 + $start - 1]) {
// update the diff and the indices
$diff[] = array($sequence1[$index1 + $start - 1], UNMODIFIED);
$index1 --;
$index2 --;
} elseif ($index2 > 0 && $table[$index1][$index2] == $table[$index1][$index2 - 1]) {
// update the diff and the indices
$diff[] = array($sequence2[$index2 + $start - 1], INSERTED);
$index2 --;
}else{
// update the diff and the indices
$diff[] = array($sequence1[$index1 + $start - 1], DELETED);
$index1 --;
}
}
// return the diff
return $diff;
}
function toTable($diff, $indentation = '', $separator = '<br>') {
$html = $indentation . "<table class=\"diff\">\n";
// loop over the lines in the diff
$index = 0;
while ($index < count($diff)){
// determine the line type
switch ($diff[$index][1]){
// display the content on the left and right
case UNMODIFIED:
$leftCell =
self::getCellContent(
$diff, $indentation, $separator, $index, UNMODIFIED);
$rightCell = $leftCell;
break;
// display the deleted on the left and inserted content on the right
case DELETED:
$leftCell =
self::getCellContent(
$diff, $indentation, $separator, $index, DELETED);
$rightCell =
self::getCellContent(
$diff, $indentation, $separator, $index, INSERTED);
break;
// display the inserted content on the right
case INSERTED:
$leftCell = '';
$rightCell =
self::getCellContent(
$diff, $indentation, $separator, $index, INSERTED);
break;
}
// extend the HTML with the new row
$html .=
$indentation
. " <tr>\n"
. $indentation
. ' <td class="diff'
. ($leftCell == $rightCell
? 'Unmodified'
: ($leftCell == '' ? 'Blank' : 'Deleted'))
. '">'
. $leftCell
. "</td>\n"
. $indentation
. ' <td class="diff'
. ($leftCell == $rightCell
? 'Unmodified'
: ($rightCell == '' ? 'Blank' : 'Inserted'))
. '">'
. $rightCell
. "</td>\n"
. $indentation
. " </tr>\n";
}
// return the HTML
return $html . $indentation . "</table>\n";
}
?>
You are using $this for a function which is not a method of any class.
Instead of
$test = $this->compareFiles($file1,$file2,true);
Use:
$test = compareFiles($file1,$file2,true);
Also, change
return $this->compare(file_get_contents($file1),file_get_contents($file2),$compareCharacters);
To
return compare(file_get_contents($file1),file_get_contents($file2),$compareCharacters);
And to the remaining changes in this way.
I created a helper in opencart following information I found here on stackoverflow, but I have a problem:
First I created a helper file called general.php and placed inside the folder:
system/helper/general.php
Then started in startup.php file
require_once(DIR_SYSTEM 'helper/general.php');
Finally, I use it inside the controller: register.php which is inside the folder catalog/controller/account/register.php.
I used it in this way:
if (empty($this->request->post['doc']) && $this->general->validate($this->request->post['doc'])) {
$this->error['doc'] = 'doc is invalid';
}
And is returning the following error:
Fatal error: Call to a member function validate() on a non-object in / home/centralshopdistribuidora/www/vqmod/vqcache/vq2-catalog_controller_account_register.php on line 515
line 515:
if (empty($this->request->post['doc']) && $this->general->validate($this->request->post['doc'])) {
The general.php file:
function validate($doc) {
$d1 = 0;
$d2 = 0;
$doc = preg_replace("/[^0-9]/", "", $doc);
$ignore_list = array(
'00000000000',
'01234567890',
'11111111111',
'22222222222',
'33333333333',
'44444444444',
'55555555555',
'66666666666',
'77777777777',
'88888888888',
'99999999999'
);
if (strlen($doc) != 11 || in_array($doc, $ignore_list)) {
return false;
} else {
for ($i = 0; $i < 9; $i++) {
$d1 += $doc[$i] * (10 - $i);
}
$r1 = $d1 % 11;
$d1 = ($r1 > 1) ? (11 - $r1) : 0;
for ($i = 0; $i < 9; $i++) {
$d2 += $doc[$i] * (11 - $i);
}
$r2 = ($d2 + ($d1 * 2)) % 11;
$d2 = ($r2 > 1) ? (11 - $r2) : 0;
return (substr($doc, -2) == $d1 . $d2) ? true : false;
}
}
You first need to register this helper into the registry, e.g. in Your index.php find line
// Encryption
$registry->set('encryption', new Encryption($config->get('config_encryption')));
(referring to OC 1.5.5 and higher) and after this register Your helper the same way, e.g.
// General
$registry->set('general', new General()));
This should be enough. Make sure to change the constructor call if You have some dependencies...
I have page with a URL like this:
http://***.com/profile/username#profile_favs
With my pagination it looks like this:
http://***.com/profile/username?s=0&p=1#profile_favs
The last example doesn't work.
Basically my pagination-function looks like this:
function Pagination($pages, $start, $display, $link_url="", $anchor="") {
echo '<div id="pagination">';
$current_page = ($start / $display) + 1;
$paginator_num = 5;
$pages_display = 10;
if ($current_page > $pages - $paginator_num) {
$paginator_num = $pages_display - ($pages - $current_page);
} elseif ($current_page < $paginator_num + 1) {
$paginator_num = $pages_display - $current_page;
} else {
$paginator_num = 5;
}
$min = max($current_page - $paginator_num, 1);
$max = min($current_page + $paginator_num, $pages);
for ($i = $min; $i <= $max; $i++) {
if ($i != $current_page) {
echo '<div class="pagination_link">';
echo '' . $i . '';
echo '</div>';
} else {
echo '<div id="pagination_active" class="pagination_link">';
echo $i . ' ';
echo '</div>';
}
}
echo '</div>';
}
And this is the part that calculates the pages (this part gets included right before my pagination-function):
<?php
$display = $display_num;
if (isset($_GET['p']) && is_numeric ($_GET['p'])) {
$pages = $_GET['p'];
} else {
$total_results = $qr_num;
if ($total_results > $display) {
$pages = ceil ($total_results / $display);
} else {
$pages = 1;
}
}
if (isset($_GET['s']) && is_numeric ($_GET['s'])) {
$start = $_GET['s'];
} else {
$start = 0;
}
?>
Now my question is: Is there any workaround possible to get that pagination working with a URL mentioned above:
http://***.com/profile/username?s=0&p=1#profile_favs
Actually I'd prefer a solution without GET-parameters.
You could use an AJAX call with the XMPHttpRequest Object to fetch it without the get parameters.
Another thing you could do (if you are using Apache) is to look at mod_rewrite for urls.
Hope that helps :)