var_dump($this->externalProjects);
var_dump($this->projects);
$result = array_diff($this->externalProjects, $this->projects);
print_r($result);
它输出：
array (size=6) // external projects
0 =>
object(CloseCall'ValueObject'Project)[79]
private 'name' => string '(A11) Tyre Pyrolysis Plant, Civil, Mech & Elec' (length=46)
1 =>
object(CloseCall'ValueObject'Project)[80]
private 'name' => string '(B) - Millerhill New Depot Proposal' (length=35)
2 =>
object(CloseCall'ValueObject'Project)[81]
private 'name' => string '(B13) Port of Tyne Wood Pellet Handling Facilities' (length=50)
3 =>
object(CloseCall'ValueObject'Project)[82]
private 'name' => string '(C) - Millerhill Proposed New Depot' (length=35)
4 =>
object(CloseCall'ValueObject'Project)[83]
private 'name' => string '(S) - EGIP New Depot Proposal' (length=29)
5 =>
object(CloseCall'ValueObject'Project)[85]
private 'name' => string '00352 Allerton - Building fabric & structure survey' (length=51)
array (size=1) //projects
0 =>
object(CloseCall'ValueObject'Project)[15]
private 'name' => string '(A11) Tyre Pyrolysis Plant, Civil, Mech & Elec' (length=46)
// no output for array_diff
要比较这样的对象，您应该查看array_udiff .这两个函数之间的主要区别在于array_udiff将回调函数作为参数，然后用于比较对象。
请参阅文档。http://php.net/manual/en/function.array-udiff.php
例
int comparison(Array $a, Array $b){
if ($a['id']==$b['id'] && $a['other']==$b['other'] && $a['timestamp']==$b['timestamp']){
return 0
}else{
return -1
}
}
array_udiff($a, $b, 'comparison')
此函数检查每个数组键值是否相同，如果是，则返回 0，然后array_udiff将从比较数组中删除该对象。