 PHP : Function Reference : Standard PHP Library (SPL) Functions : ArrayObject::offsetUnset
primaryspace
Removes an index from the array object, reducing the number of elements by one and condensing the list.
<?php
$ao = new ArrayObject(array(1, 2, 3));
foreach($ao->getIterator() as $item) {
if ($item == 2) {
$ao->offsetUnset($ao->getIterator()->current());
}
}
echo $ao->count(); // Prints 2
?>
---
Note from the extension author:
Try this:
<?php
$ao = new ArrayObject(array(1, 2, 3));
foreach($ao as $key=>$item) { // getIterator() called automatically
if ($item == 2) {
$ao->offsetUnset($key);
}
}
echo $ao->count(); // Prints 2
?>
oalexandrino
Be careful when you are working with collections. This method works with the reference of an array instead of its retrieved value.
So, you can do a mistake.
In order to understand have a look at code as follow:
<?php
class Employee
{
public function __construct()
{
}
}
class Company
{
private $arrEmployee;
public function __construct()
{
}
public function AddEmployee(Employee $oEmployee)
{
$this->arrEmployee[] = $oEmployee;
}
public function getEmployeeList()
{
return $this->arrEmployee;
}
}
?>
<?php
// first, creates the Company object
$oCompany = new Company();
// second, add 10 elements in
foreach( range(0, 9) as $index )
{
$oCompany->AddEmployee( new Employee() );
}
// get them
$arrEmployee = $oCompany->getEmployeeList();
// creates an ArrayObject from "$arrEmployee"
$arrayobject = new ArrayObject($arrEmployee);
// unsets its firt five elements
foreach( range(0, 4) as $index )
{
$arrayobject->offsetUnset($index);
}
// get them again
$arrEmployee = $oCompany->getEmployeeList();
// it shows just 5 elements, they were removed as reference via "offsetUnset" method
print_r($arrEmployee) ;
?>
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