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I have written the PHP code below in order to create a dynamic matrix with different count of columns per row but PHPStorm says the row variable is not defined. please help.
class reply
{
public $text;
private $row = array(array());
private $rowIndex = 0;
private $colIndex = 0;
public function Add($menu)
{
$this->$row[$this->rowIndex][$this->colIndex] = $menu;
$this->colIndex++;
}
public function NextRow()
{
$this->rowIndex++;
$this->colIndex = 0;
}
}
$this->$row is incorrect, it should be $this->row.
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I am trying to access an associative array $foo from a function inside the class. When I log the contents from another function it is empty. I am really unsure what I am doing wrong.
class Item {
function __construct($x = 1) {
$y = do_something($x);
$foo = [
'id' => $y['anotherID'],
'name' => $y['name']
];
}
function insertData($data) {
$variable = $this->foo['id'];
// if I print $this->foo['id'] I get no output
}
}
I have also tried another recommendation of using self::$foo but got all sorts of errors about private and static?
You need to use $this->foo = [] instead of $foo = []. It makes it a property of the class.
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Closed 2 years ago.
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I'm using php 7.2.
I need to instantiate an object of a class with a property that have to contain an array of objects.
When I try to add elements to array, I get an "Array to string conversion" error.
this is the code example:
class MyProduct
{
public $id;
public $stocks = array();
}
class MyStock
{
public $quantity;
public $leadTime;
}
private function Test()
{
$prod = new \MyProduct();
$prod->id = 1;
$stock1 = new \MyStock();
$stock1->quantity = 10;
$stock1->leadTime = 2;
array_push($prod->$stocks, $stock1);
}
How can I make it?
thanks in advance
Try array_push($prod->stocks, $stock1);
With $stocks you’re trying to refer to a variable called stocks.
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I have this little function to stop a string being too long but it dosen't seem to work. I'm assuming i've done something wrong?
function trimString($string, $maxChar) {
$string = (strlen($string) > $maxChar) ? substr($string,0,$maxChar).'...' : $string;
}
I was using it like this:
echo trimString($row['mainTitle'], 30);
Thanks
You forgot to return value from function. Try
function trimString($string, $maxChar) {
return (strlen($string) > $maxChar) ? substr($string,0,$maxChar).'...' : $string;
}
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Closed 8 years ago.
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I'm having to put together a PHP snippet involving capturing form submission data. I'm trying to do this the "right" way with OOP PHP, and I'm struggling with array usage since my Googling seems to bring up sample code that is either too simple or too complex for what I'm trying to do.
How do I create a class method that adds keys and values to an array?
My code, which does not work currently:
class Connection
{
private $postItem = array();
public function addPostItem($key,$value)
{
$postItem[$key] -> $value;
}
public function printPostItem() {
return $this->postItem;
}
}
$c1 = new Connection;
$c1->addPostItem('FirstName','John');
$c1->addPostItem('LastName','Doe');
$c1->addPostItem('Email','JohnDoe#mail.com');
var_dump($c1->printPostItem()); // shows no array content
If I'm going against other best practices here, please let me know.
Use this:
public function addPostItem($key,$value)
{
$this->postItem[$key] = $value;
}
Change:
$postItem[$key] -> $value;
To:
$this->postItem[$key] = $value;
Also as Amal said turn on error reporting.
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So I create a Supermarket class and initiate two objects like this:
$items[0] = new Supermarket("Item1", 2.70);
$items[1] = new Supermarket("Item2", 1.0);
Then I call the showItem() method on the first object of the array and it works:
$items[0]->showItem();
But when I try to use a for or a foreach loop through the array to show all the items I get the non-object error. The following won't work either:
$i = 0;
$items[i]->showItem();
Any ideas?
You are not using the variable sign $
$i = 0;
$items[$i]->showItem();
change like
$i = 0;
$items[i]->showItem();
$i = 0;
$items[$i]->showItem();
$items[$i] instead of $items[i]