PHP数组搜索和操作

试试这个简单的foreach

ex- 
company1   title1   $1000 
company1   title1   $1500 

company2   title2   $2000 
company2   title3   $2500 

company3   title3   $3000 
company3   title3   $2500 

output - 

company1   title1   $1250 

company2   title2   $2000 
company2   title3   $2500 

company3   title3   $2750 

---

如果您不需要使用每一行，那么您可以通过SQL完成这一切：

$reuslSetArray = array();
if (!is_null($arr)) {
    foreach ($arr as $key => $mainArray) {
        $reuslSetArray[$mainArray['j_company'] . '_' . $mainArray['j_title']][] = $mainArray['j_salary'];
    }
}

if (!is_null($reuslSetArray)) {
    foreach ($reuslSetArray as $key => $resultArray) {
        $labels = explode("_", $key);
        $value = array_sum($resultArray) / count($resultArray);
        echo $labels[0] . ' ' . $labels[1] . ' ' . $value . " <br>";
    }
}

查询结果在$row中

---

仅供参考，对于代码块，请单击代码高亮显示的{}，而不是使用记号。刻度是用于内联代码的，我不会连接字符串。它使层次结构不那么明显，代码也不那么明显。i、 e.使用$RESULTSTARRAY[$jCompany][$jTitle][]=$jSalary；相反，我们也可以得到平均值。从表组中选择j_公司、j_标题、计数*为c、SUMj_工资/c为平均值，由j_公司、j_标题、Hanks组成。我没想到。

$reuslSetArray = array();
if (!is_null($arr)) {
    foreach ($arr as $key => $mainArray) {
        $reuslSetArray[$mainArray['j_company'] . '_' . $mainArray['j_title']][] = $mainArray['j_salary'];
    }
}

if (!is_null($reuslSetArray)) {
    foreach ($reuslSetArray as $key => $resultArray) {
        $labels = explode("_", $key);
        $value = array_sum($resultArray) / count($resultArray);
        echo $labels[0] . ' ' . $labels[1] . ' ' . $value . " <br>";
    }
}

SELECT j_company,j_title,COUNT(*) as c, SUM(j_salary) as s FROM table GROUP BY j_company, j_title

$avg = $row['s'] / $row['c'];