我有以下代码从数组中删除元素：
for ($i = 0; $i < count($contracte); $i++) {
if ($contracte[$i]['total_luni_contract'] == $contracte[$i]['luni_contract_cu_cheltuieli']) {
unset($contracte[$i]);
}
}
阵列如下：
Array
(
[0] => Array
(
[id_contract] => 3
[numar] => 2955
[data] => 2011-04-04
[total_luni_contract] => 2
[luni_contract_cu_cheltuieli] => 0
)
[1] => Array
(
[id_contract] => 25
[numar] => 14
[data] => 2013-01-07
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 1
)
[2] => Array
(
[id_contract] => 26
[numar] => 15
[data] => 2013-01-07
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 1
)
[3] => Array
(
[id_contract] => 27
[numar] => 16
[data] => 2013-01-07
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 0
)
[4] => Array
(
[id_contract] => 28
[numar] => 17
[data] => 2013-01-07
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 0
)
[5] => Array
(
[id_contract] => 29
[numar] => 23
[data] => 2013-01-08
[total_luni_contract] => 6
[luni_contract_cu_cheltuieli] => 0
)
[6] => Array
(
[id_contract] => 30
[numar] => 24
[data] => 2013-01-08
[total_luni_contract] => 6
[luni_contract_cu_cheltuieli] => 0
)
[7] => Array
(
[id_contract] => 31
[numar] => 33
[data] => 2013-01-09
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 1
)
[8] => Array
(
[id_contract] => 32
[numar] => 34
[data] => 2013-01-09
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 0
)
[9] => Array
(
[id_contract] => 33
[numar] => 35
[data] => 2013-01-09
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 0
)
[10] => Array
(
[id_contract] => 34
[numar] => 36
[data] => 2013-01-09
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 0
)
[11] => Array
(
[id_contract] => 35
[numar] => 37
[data] => 2013-01-09
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 0
)
[12] => Array
(
[id_contract] => 36
[numar] => 38
[data] => 2013-01-09
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 0
)
[13] => Array
(
[id_contract] => 37
[numar] => 39
[data] => 2013-01-09
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 0
)
[14] => Array
(
[id_contract] => 38
[numar] => 40
[data] => 2013-01-09
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 0
)
[15] => Array
(
[id_contract] => 39
[numar] => 41
[data] => 2013-01-09
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 0
)
[16] => Array
(
[id_contract] => 40
[numar] => 42
[data] => 2013-01-09
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 0
)
[17] => Array
(
[id_contract] => 41
[numar] => 43
[data] => 2013-01-09
[total_luni_contract] => 6
[luni_contract_cu_cheltuieli] => 0
)
[18] => Array
(
[id_contract] => 42
[numar] => 44
[data] => 2013-01-09
[total_luni_contract] => 6
[luni_contract_cu_cheltuieli] => 0
)
[19] => Array
(
[id_contract] => 43
[numar] => 45
[data] => 2013-01-09
[total_luni_contract] => 6
[luni_contract_cu_cheltuieli] => 0
)
[20] => Array
(
[id_contract] => 44
[numar] => 46
[data] => 2013-01-09
[total_luni_contract] => 6
[luni_contract_cu_cheltuieli] => 6
)
[21] => Array
(
[id_contract] => 45
[numar] => 47
[data] => 2013-01-09
[total_luni_contract] => 6
[luni_contract_cu_cheltuieli] => 6
)
[22] => Array
(
[id_contract] => 46
[numar] => 48
[data] => 2013-01-09
[total_luni_contract] => 6
[luni_contract_cu_cheltuieli] => 4
)
)
运行代码后，数组保持不变。应取消设置$contracte[1]、$contracte[2]、$contracte[7]和$contracte[20]。
有什么想法吗？
改为对数组运行foreach。已经证明，从当前使用foreach循环迭代的数组中删除键是完全安全的。
foreach($contracte as $cheie => $contract) {
if ($contract['total_luni_contract'] == $contract['luni_contract_cu_cheltuieli']) {
unset($contracte[$cheie]);
}
}
问题：当循环到达第二个元素（1）时，它会取消设置，所以位于2的元素会到达那个位置。所以在下一个循环中，它检查$i=1，它将是下一个元素。所以（2）被跳过了。
解决方案：
使用前臂
foreach($contracte as $key=> $val) {
if ($val['total_luni_contract'] == $val['luni_contract_cu_cheltuieli']) {
unset($contracte[$key]);
}
}
或
将键设置为字符串-使其成为关联数组，然后再设置您的解决方案。
如果你的数组是这样的：它将工作
Array
(
[one] => Array
(
[id_contract] => 3
[numar] => 2955
[data] => 2011-04-04
[total_luni_contract] => 2
[luni_contract_cu_cheltuieli] => 0
)
[two] => Array
(
[id_contract] => 25
[numar] => 14
[data] => 2013-01-07
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 1
)
[three] => Array
(
[id_contract] => 26
[numar] => 15
[data] => 2013-01-07
[total_luni_contract] => 1
[luni_contract_cu_cheltuieli] => 1
)
[four] => Array
(
[id_contract]
尝试使用array_splice代替
阵列拼接（$contracte，$i，1）；
此外，当您从数组中删除某些内容时，您需要递减$i，这样它将再次检查位置$i处的项。