I'm looping through an object:
foreach ($data as $asset) {
$asset->test = 'test';
}
test exists in $data and is set to something else, I wish to replace it with 'test'.
The above fails to work. Where am I going wrong?
You should use referenced loop with & like foreach ($data as &$asset)
foreach ($data as &$asset)
{
$asset->test = 'test';
}
Referenced loop will have an effect to $data, otherwise only current $asset object changes.
You can think about using a function that already exists, like array_walk that would execute your function.
function test_exists(&$asset) {
$asset->test = "test";
}
array_walk($data, "test_exists");
Related
How can I retrieve a data from my database in the controller, and assign it to a variable, that I will send to the view?
$data['schedule'] = $this->SectionsModel->getschedule($section);
I want the
$schedule['teacher']
(as equivalent to a view) data from the statement above to be passed to a variable, but how?
I tried this one but it shows an error
$data['schedule'] = $this->SectionsModel->getschedule($section);
foreach ($data['schedule'] as $key => $value){
echo $value['teacher'];
}
may be you can use result_array() in return value of your model.
Check your getschedule() method in your SectionModel if it's using the function result() instead of result_array().
The difference between the two methods is that result() will return object while result_array() will return array.
In you case,
$data['schedule'] = $this->SectionsModel->getschedule($section);
foreach ($data['schedule'] as $key => $value){
echo $value['teacher'];
}
Maybe $data['schedule'] is an object.You must use,
$data['schedule'] = $this->SectionsModel->getschedule($section);
foreach ($data['schedule'] as $key => $value){
echo $value->teacher;
}
If you will use result_array() method in your getschedule() in SectionModel to return result, do like this,
$data['schedule'] = $this->SectionsModel->getschedule($section);
foreach ($data['schedule'] as $key => $value){
echo $value['teacher'];
}
Hope this will help.
Just a quick question.
I need to create a find query in Yii2 where an andWhere is only present if a variable is true.
public function getCheckBoxItems($holiday=false)
{
$Items = Items::find()->where(['type'=>'checkbox']);
Yii::info(print_r($Items,1), 'c');
if($holiday)
$Items->andWhere(['<>','category','holiday']);
$Items->All();
foreach($Items as $Item)
{
//do something
}
}
This doesn't work
However this deos work and i expected it to.
$Items = Items::find()->where(['type'=>'checkbox'])->andWhere(['<>','category','holiday'])->All();
How do I only add the andWhere based on the $holiday variable
Thanks in advance
Regards
Liam
UPDATE
i have found one way, but i am sure there is a better way
if($holiday)
$Items = Items::find()->where(['type'=>'checkbox'])->andWhere(['<>','category','holiday'])->All();
else
$Items = Items::find()->where(['type'=>'checkbox'])->All();
Just to make your code more clear and readable, you should simply try :
$itemsQuery = Items::find()->where(['type'=>'checkbox']);
if($holiday)
$itemsQuery->andWhere(['<>','category','holiday']);
$items = $itemsQuery->all();
foreach($items as $item)
{
//do something
}
You have to store $items result at each checkpoint:
public function getCheckBoxItems($holiday=false)
{
$Items = Items::find()->where(['type'=>'checkbox']);
Yii::info(print_r($Items,1), 'c');
if($holiday)
$Items->andWhere(['<>','category','holiday']);
$Items = $Items->All();
foreach($Items as $Item)
{
//do something
}
}
I've got a PHP object. One of the values within the object is in array. I'm trying to get a foreach to just read the array within the object but it doesn't seem to be working.
PHP:
foreach ($object->ArrayName as $value) {
echo $value;
}
is there any way of doing this?
well, if you have an object but you don't know which property is an array, you need to catch them all and verify if they are an array:
// get each value of the object and call it as property
foreach(get_object_vars($object) as $property) {
// if this property is an array...
if (is_array($property) {
// ... access to every value of that array
foreach($property as $value) {
// $property is your array and $value is every value
// here you can execute what you need
}
}
}
Use
is_array($obj)
to validate whether it's an array or not.
you said your php object contains arrays, hence you need to use 2 foreach loops like this.
<?php
foreach($object->ArrayName as $value) {
foreach($value as $item) {
echo $item;
}
}
?>
if the loop is withing the object wich mean inside the class use $this instead :
foreach ($this->ArrayName as $value) {
echo $value;
}
I need to create a column-system for Wordpress with shortcodes, which is not a problem, but I'm trying to make it with less code.
I have an array with the data needed, I loop through it, create a unique-named function and set it as shortcode-function. The third step is a mystery. How can I create a function from a variable.
Here's an example, how it should be done:
$data[] = "first";
$data[] = "second";
foreach($data as $key => $value) {
function $value($atts,$content) {
return '<div class="'.$value.'">'.$content.'</div>';
}
add_shortcode($value,$value);
}
However, it seems that it's not possible to make it work like that in PHP. Is there any way to make this work, as I would not want to write all the (identical) functions separated. I could make the shortcode something like [col first]text[/col] but the client wants to have different names for every one of them.
you can use the double dollar syntax to use the value of a variable as a variable identifier,
Example:
$variable = "test";
$$variable = "value of test"
echo $test; //or echo $$variable;
I have never tried but you way want to try:
foreach($data as $key => $value)
{
function $$value($atts,$content)
{
}
add_shortcode($value,$value);
}
or a function like create_function
if your using PHP 5.3 or greater then you can do something like so:
$$value = function()
{
}
which should work fine
I'm not sure how WP invocates the functions, but if it uses call_user_func then you might cheat by using an object with virtual methods:
class fake_functions {
function __call($name, $params) {
return '<div class="'.$name.'">'.$params[1].'</div>';
}
}
$obj = new fake_functions();
foreach ($data as $value) {
add_shortcode($value, array($obj,$value));
}
I would like to loop through the contents of a query object update certain values and return the object.
function clearAllIds($queryObject)
{
foreach($queryObject->result() as $row)
{
$row->id = 0;
}
return $queryObject
}
In this example I would like to zero out all of the ID values. How can I accomplish this within the foreach loop?
Please excuse the formatting.
This entirely depends on what the class of your query object is, and whether or not you'll be able to Pass by reference.
Assuming your $queryObject->result() can be delivered in a write-context, you could preface the $row with an ampersand to pass it by reference, like so:
foreach($queryObject->result() as &$row)
{
$row->id = 0;
}
function clearAllIds($queryObject)
{
foreach($queryObject->result() as &$row)
{
$row->id = 0;
}
return $queryObject
}
Use the & operator to get $row as a reference.
Edit: This will work if $queryObject is an array. You should probably do
$data = $queryObject->result();
foreach($data as &$row) { ... }
return $data;
function trim_spaces($object)
{
foreach (get_object_vars($object) as $property=> $value)
{
$object->$property=trim($value);
}
}
//no need to return object as they are passed by reference by default