I am trying to paginate an array in CakePHP. The array is extracted from a JSON file, thus not using any database queries or whatsoever. I'm trying to stick to the functions of CakePHP to make sure I don't write useless code. I have been looking around and can not find any answer on my question.
The array is as of the following:
array(161) {
[0]=> array(8) {
["id"]=> int(589)
["status"]=> string(7) "running"
["threads"]=> int(12)
["create_time"]=> float(1487712882.42)
["memory_usage_precent"]=> float(11.0328674316)
["cpu_usage_precent"]=> int(62)
["cwd"]=> string(1) "/"
["process_name"]=> string(16) "plugin-container"
}
}
This is one row of the 161 rows in the array. How can I paginate this by using CakePHP's methods?
Here is an example for making pagination from Array
Step 1 - PHP Data Array :
$data = [
[
"id"=> 0,
"status"=> "running"
],[
"id"=> 1,
"status"=> "running"
],
#More Arrays ...
];
Step 2 - Prepare Data [Calculations]
$TotalDatas = count($data); #Total number of Data in Array
$StartFrom = 0; #Start from Array index
$DisplayLimit = 2; #Limit the result per page
$CurrentPage = isset($_GET['page'])? $_GET['page'] : 0; #Get the page number value from URL
$StartFrom = $CurrentPage*$DisplayLimit; #Update the Array index by calculating Page number and Limit
Step 3 - Display Data using loop :
for($i=$StartFrom; $i<$StartFrom+$DisplayLimit; $i++){ #Increase the Array index by Limit
if($i>=$TotalDatas){
continue; #Break Or put some message, Because no more Data in Array
}
var_dump($data[$i]);
}
Browse URL like as - localhost?page={PAGE_MUNBER_HERE}
Example :
localhost?page=3
Note : Above codes is the simple example of basic pagination.
Related
Long time user, first time poster. The forums here have got me out of a lot of trouble but I'm really stuck on this one.
I'm using Pods for a Custom Post Type that has a Custom Field where a user can enter a numeric value. eg. or 4 or 2 etc
I want to display the total sum of this Custom Field across all user made posts on the front end. To achieve this I'm using a Pods Template to make a short code for the front end, but to do the calculation I'm using PHP.
So my current PHP is:
function jobs_total ($id) {
$pods = pods ('pledged_job', $id);
$jobs = ($pods->field ('jobs_pledged'));
$a = ($jobs);
$b = explode(' ', $a);
var_dump($b);
}
And the result I get so far is:
array(1) { [0]=> string(1) "5" }
array(1) { [0]=> string(1) "4" }
array(1) { [0]=> string(1) "2" }
array(1) { [0]=> string(1) "7" }
How do I take the numeric values from "_", which are correctly appearing from post entries, and combine them in a new array so I can perform an 'array_sum' and return the total of those numbers?!
I'm a PHP novice so I'm not sure if this is obvious or if it's a clash between Pods terms and standard PHP.
Thanks in advance!!
Final code wrapped in shortcode to allow for displaying on the frontend through Elementor
function jobs_shortcode () {
$jobs = get_posts(array(
'post_type' => 'pledged_job',
'post_status' => 'publish',
'numberposts' => -1, ));
$total = 0;
foreach ($jobs as $field) {
$total += (int) get_post_meta($field->ID, 'jobs_pledged', true);
}
echo $total;
}
add_shortcode( 'jobs', 'jobs_shortcode' );
I have this in my routes (only place it works...)
$constants = DB::table('constants')->get();
View::share('constants', $constants);
If in one of my views I var_dump constants I get this:
array(1) { [0]=> object(stdClass)#129 (3) { ["id"]=> string(1) "1" ["type"]=> string(13) "business_name" ["value"]=> string(17) "Project Framework" } }
I then want to do:
$business_name = $constants->business_name;
or
$business_name = $constants['business_name'];
How can I manipulate my array from the DB call to be able to use the constants variable like this?
Is there a way in Laravel to do this simpler / more efficient than looping through in a foreach and creating the array?
Assuming you have only one row in your constants you should use first() to retrieve a single record and not a collection:
$constants = DB::table('constants')->first();
Then you get a single object so you can use this notation to access the properties:
$business_name = $constants->business_name;
Edit
With your type-value structure I suggest using lists:
$constants = DB::table('constants')->lists('value', 'type');
This will create an array like this:
[
'business_name' => 'Project Framework',
'foo_type' => 'bar_value'
]
Usage
$business_name = $constants['business_name'];
I am working in WordPress. I am using a plugin to get the admin options. The plugin takes an argument as an ID to get the value from the database like so.
$option = ot_get_option('email_address');
The above line of code would return
myEmail#example.com
I want to write a helper function that would get multiple values at once. Normally, I would get the options like this.
$option_1 = ot_get_option('option1');
$option_2 = ot_get_option('option2');
$option_3 = ot_get_option('option3');
I figured there could be a better way that would look a little nicer. I put together this little function that does work
function ritual_get_options($arg_list = array())
{
$options = array();
foreach( $arg_list as $key => $value){
$options[] = ot_get_option($value, array());
}
return $options;
}
using the function above, I can now pass the id's of the options like so
ritual_get_options('option1','option2','option3');
My issue is that the above will return an array with numeric keys. 0,1,2. Here is the exact array that is getting returned when I do a var_dump on the front end
[0]=>
string(16) "100 Main Street,"
[1]=>
string(18) "Hamilton, Ontario."
[2]=>
string(15) "+1 800 999 9898"
[3]=>
string(19) "mail#yourdomain.com"
I want to return the array keys with the value so that I can easily figure out what value is in what key. Here is the line that I used to get the above array
$options = ritual_get_options(array('number' => 'streetnumber','street' => 'street','phone' => 'phone_number','email' => 'email'));
When I go to use the returned values, I want to be able to use the key so that I could do
echo $options['number'];
instead of doing
echo $options[0];
I have not been able to figure out how to return the keys passed in to the function and preserve them into through the return.
Set the option name as key while building the array:
foreach( $arg_list as $option ){
$options[$option] = ot_get_option( $option );
}
Btw, using extract() on the $options array will allow you to use e.g. $phone_number instead of $options['phone_number']
I'm working on a project in CodeIgniter 2 and now I'm stuck on the most basic of concepts.
Model:
Get an object array from my table which contains all rows that match a specific value for a field named foo. There can be one or more rows that match. In this example, two rows.
public function get_sample($foo)
{
$query = $this->db->get_where('sample_db', array('foo' => $foo));
return $query->result();
}
Controller:
Assign the results and make output available to view.
public function view($foo)
{
$data['array'] = $this->sample_model->get_sample($foo);
$this->load->view('view', $data);
}
View:
echo var_dump($array); // for testing
echo $array[1]->text
var_dump() of $array:
array(2) {
[0]=> object(stdClass)#23 (4) {
["id"]=> string(1) "1"
["foo"]=> string(3) "bar"
["number"]=> string(4) "1234"
["text"]=> string(23) "This is content in 1234"
}
[1]=> object(stdClass)#24 (4) {
["id"]=> string(1) "2"
["foo"]=> string(3) "bar"
["number"]=> string(4) "9999"
["text"]=> string(23) "This is content in 9999"
}
}
The rendered ouput of echo $array[1]->text; is: This is content in 9999
And I understand how all that is working: $array[1]->text is the content of the text field in the array object with the index of 1, my second object.
However, I have a field called number and I want to access the object with a certain number and get its corresponding text value.
Example: How can I retrieve the value of text where the number is 9999? I cannot use $array[1]->text since I can never be sure of the object's position in the array. Something like $array['number' => '9999']->text, but I know that's not right. Maybe I need to loop through the array looking for a match?
This looks so simple yet everything I've tried has failed and resulted in various PHP errors. I've been studying the PHP manual here and here, but cannot seem to find anything about what I'm looking to do, or maybe I'm just misapplying what I'm reading. Any guidance is appreciated.
In addition to an answer using best practices following the MVC model, I'm hoping for a link to the proper page in the documentation, as well as pointing out any errors in my wording/terminology above.
EDIT:
This answer contains the actual code I used to solve my problem. Although, Yagi's answer was accepted because it put me in the right direction.
How about using this :
foreach ($array as $row) {
if ($row->number == '9999') {
echo $row->text;
}
}
Loop through the array, and find the number object value of 9999 and get the text
Why don't you just to a query and search for that number (or order by that number?)
Either way, what you need is a multidimensional array search function (that iterates through array of object and returns the found field value combo )
Something like this (put this in helper)
function multi_array_search($array, $field, $value)
{
$results = array();
if (is_array($array))
{
if ($array->$field == $value) //chek the filed against teh value, you can do addional check s(i.e. if field has been set)
$results[] = $array;
foreach ($array as $subarray)
$results = array_merge($results, multi_array_search($subarray, $key, $value)); //recurisve serach
}
return $results;
}
//than in view or in controller, depending where you need it
$result = multi_array_search($array, "number", "9999");
var_dump($result) will return or whether number of foudn instances
array() {
[0]=> object(stdClass)#24 (4) {
["id"]=> string(1) "2"
["foo"]=> string(3) "bar"
["number"]=> string(4) "9999"
["text"]=> string(23) "This is content in 9999"
}
}
you might be looking for something like this...
array_filter($array, function($o){ return $o->number == 9999; } );
http://php.net/manual/en/function.array-filter.php
EDIT
$o is the parameter in the callback function. each element of the array is passed to the callback function. if the function returns false, the element will be filtered out.
$arr = array(
(object) array(
'num' => 33,
'text' => 'hello',
),
(object) array(
'num' => 44,
'text' => 'world',
),
);
$filtered = array_filter($arr, function($o){ return $o->num == 33; });
echo $filtered[0]->text; // hello
as you stated, index will remain, so use array_values or array_shift. here's an example with function
function get_by_num($arr, $num){
return array_shift(array_filter($arr, function($o) use ($num) { return $o->num == $num; }));
}
$obj = get_by_num($arr, 44);
var_dump($obj);
// object(stdClass)#2 (2) { ["num"]=> int(44) ["text"]=> string(5) "world" }
in this case $obj will be either NULL if element is not found, or the first match. $num is transferred along so you can use any value. you can even improve it:
function get_first_match($arr, $field, $val){
return array_shift(array_filter($arr, function($o) use ($field, $val) { return $o->{$field} == $val; }));
}
$obj = get_first_match($arr, 'num', 44);
and now you can search any field. in your case
$obj = get_first_match($array, 'number', 9999);
Thanks to Yagi's answer, I came up with the following very simple solution. I loop through the array and assign the value of text to a new array with an index that matches the value of number. Then in the view file, I can access the text value based on this index.
Controller:
public function view($foo)
{
$data['array'] = $this->sample_model->get_sample($foo);
foreach ($data['array'] as $row) {
$data['result'][$row->number] = $row->text;
};
$this->load->view('view', $data);
}
View:
if (isset($result[9999])) echo $result[9999];
I have a html form with checkboxes. Someone selects one or more checkboxes and hit the delete button then it will delete the files references out of the database and delete the files out of Amazon S3. This is the code I used to find all the checkboxes
$checkbox_select = JRequest::getVar('checkboxselect', '', 'POST'); //just a Joomla way of doing a $_POST with extra security
var_dump($checkbox_select); //this returns: array(2) { ["video_1.mp4"]=> string(2) "on" ["video_2.mp4"]=> string(2) "on" ["video_3.mp4"]=> string(2) "on"}
// Localize and sanitize each individual value
foreach (array_keys($checkbox_select) as $element) {
$deleteNames[] = $db->quote($element);
}
var_dump($deleteNames); //array(3) { [0]=> string(13) "'video_3.mp4'" [1]=> string(13) "'video_2.mp4'" [2]=> string(13) "'video_1.mp4'" }
My problem is with Amazon S3 and multiple file deletion. The format I need to put S3 deletion in is quite confusing:
$s3->delete_objects('mybucket', array(
'objects' => array( // accepts a *list* of one or more *hashes*
// a *hash* that contains a "key" key with a value, and maybe a "version_id" key with a value
array('key' => 'object (file) name'),
// a second hash representing a file
// a third hash representing a file
// and so on...
),
));
As far as I understand (from S3 delete_objects function) the final associated array has key as the actual key value. With the last var_dump I've got all video names in an array now I just need to convert that array to a bunch of arrays in this format:
array ('key' => 'video_1.mp4'),
array ('key' => 'video_2.mp4'),
array ('key' => 'video_3.mp4'),
...and so on
How can I create these arrays? Should I be using the first var_dump I have or the second (they both have the video file names listed)? Thanks in advance.
You can use foreach to loop over your array and create a new array in the desired format.
Example:
<?php
foreach (array_keys($checkbox_select) as $element) {
$deleteNames[] = array('key' => $db->quote($element));
}
Untested, may contain errors
have a look at this post in the php documentation for array_push(). You'll get a brief idea of how to achieve it.