数组中对某项相同的值进行求和计算
已知数组：
$arr = array(15) {
[0]=>
array(9) {
[lppt]=>
string(4) lp1
[fg_type]=>
string(5) ecu
[customer_no]=>
string(4) a001
[etype1]=>
string(3) dig
[revdegree]=>
string(2) s
[item1]=>
float(8810)
[rs1]=>
float(5787788.527)
[item2]=>
float(8928)
[rs2]=>
float(5865309.4176)
}
[1]=>
array(9) {
[lppt]=>
string(4) lp1
[fg_type]=>
string(3) ecu
[customer_no]=>
string(4) a001
[etype1]=>
string(3) mpi
[revdegree]=>
string(1) b
[item1]=>
float(0)
[rs1]=>
float(0)
[item2]=>
float(0)
[rs2]=>
float(0)
}
[2]=>
array(9) {
[lppt]=>
string(4) lp1
[fg_type]=>
string(4) ecu
[customer_no]=>
string(4) a001
[etype1]=>
string(3) mpi
[revdegree]=>
string(2) s
[item1]=>
float(63485)
[rs1]=>
float(23211270.7503)
[item2]=>
float(71973)
[rs2]=>
float(26689668.0654)
}
[3]=>
array(9) {
[lppt]=>
string(4) lp1
[fg_type]=>
string(4) ecu
[customer_no]=>
string(4) a002
[etype1]=>
string(3) mpi
[revdegree]=>
string(2) s
[item1]=>
float(4810)
[rs1]=>
float(2329072.60146)
[item2]=>
float(5855)
[rs2]=>
float(2783605.29921)
}
[4]=>
array(9) {
[lppt]=>
string(4) lp1
[fg_type]=>
string(5) ecu
[customer_no]=>
string(4) a004
[etype1]=>
string(3) mpi
[revdegree]=>
string(2) s
[item1]=>
float(1716)
[rs1]=>
float(652004.847)
[item2]=>
float(1711)
[rs2]=>
float(647801.6757)
}
[5]=>
array(9) {
[lppt]=>
string(4) lp2
[fg_type]=>
string(3) ecu
[customer_no]=>
string(4) a001
[etype1]=>
string(3) mpi
[revdegree]=>
string(1) b
[item1]=>
float(0)
[rs1]=>
float(0)
[item2]=>
float(0)
[rs2]=>
float(0)
}
};
求当fg_type项相同时，针对item1,item2,rs1,rs2项的求和，并将求得的结果放在此数组后。
------解决思路----------------------
$arr = array(
array('fg_type'=>'ecu1', 'item1'=>8810, 'rs1'=>5787788.527, 'item2'=>8928, 'rs2'=>5865309.4176),
array('fg_type'=>'ecu1', 'item1'=>0, 'rs1'=>0, 'item2'=>0, 'rs2'=>0),
array('fg_type'=>'ecu2', 'item1'=>63485, 'rs1'=>23211270.7503, 'item2'=>71973, 'rs2'=>26689668.0654),
array('fg_type'=>'ecu2', 'item1'=>4810, 'rs1'=>2329072.60146, 'item2'=>5855, 'rs2'=>2783605.29921),
array('fg_type'=>'ecu3', 'item1'=>1716, 'rs1'=>652004.847, 'item2'=>1711, 'rs2'=>647801.6757),
array('fg_type'=>'ecu3', 'item1'=>0, 'rs1'=>0, 'item2'=>0, 'rs2'=>0),
);
$new_arr = array();
for($i=0; $i $arr[$i]['sum'] = $arr[$i]['item1'] + $arr[$i]['rs1'] + $arr[$i]['item2'] + $arr[$i]['rs2'];
$new_arr[$arr[$i]['fg_type']] = 0;
}
for($i=0; $i if(array_key_exists($arr[$i]['fg_type'], $new_arr)){
$new_arr[$arr[$i]['fg_type']] += $arr[$i]['sum'];
}
}
array_push($arr,$new_arr);
echo '';
print_r($arr);
测试结果应该没问题，不知道这么写好不好，凑合着看...