[英]Create an associative array in php with dynamic key and value
I want to create an associative array in php with dynamic key and also a dynamic value from a particular mysql table.我想在 php 中创建一个关联数组,其中包含动态键以及来自特定 mysql 表的动态值。
The table name is monthly_salary
with a two column named month
and salary
respectively.表名是monthly_salary
其中有两列分别名为month
和salary
。
I get the data inside it:我得到里面的数据:
$sql = mysql_query('SELECT * FROM monthly_salary');
$sql2 = mysql_query('SELECT * FROM monthly_salary');
Then assigned and concatenated the collected data to $mon
and $sal
:然后将收集到的数据分配并连接到$mon
和$sal
:
$mon = "";
$sal = "";
while($row = mysql_fetch_array($sql)){
$mon .= $row['month'].", ";
}
while($row = mysql_fetch_array($sql2)){
$sal .= $row['salary'].", ";
}
After that I've converted it to array and concatenate it until it became and associative array:之后,我将它转换为数组并将其连接起来,直到它成为关联数组:
$monArray = array(substr(trim($mon), 0, -1));
$salArray = array(substr(trim($sal), 0, -1));
$key = "";
$keyWithVal = "";
foreach($monArray as $k){
$key .= $k." => ";
}
foreach($salArray as $k){
$keyWithVal .= $key.$k.",";
}
$associativeArray = array(substr(trim($keyWithVal), 0, -1));
My Problem is that when I've echo it the result is always like this 3500=>Jan=>3500 :我的问题是,当我回应它时,结果总是像这样3500=>Jan=>3500 :
foreach($associativeArray as $k => $id){
echo $k."=>".$id;
}
So how can I fix it and with the correct output Jan=>3500 ?那么我该如何修复它并使用正确的输出Jan=>3500呢?
You are way over-complicating this problem.你把这个问题复杂化了。 This can be done simply, with fewer loops.这可以简单地完成,循环次数更少。
First, you only need to run the SQL once.首先,您只需要运行 SQL 一次。 Second, build the array in the 1st loop.其次,在第一个循环中构建数组。
$sql = mysql_query('SELECT * FROM monthly_salary');
$associativeArray = array();
while($row = mysql_fetch_array($sql)){
// Put the values into the array, no other variables needed
$associativeArray[$row['month']] = $row['salary'];
}
foreach($associativeArray as $k => $id){
echo $k."=>".$id;
}
Why don't you just do:你为什么不这样做:
$associativeArray = array();
while($row = mysql_fetch_array($sql)){
$associativeArray[$row['month']] = $row['salary'];
}
Following worked for me for creating associative array.以下为我创建关联数组。 array_push don't work on associative array but using unary operator does work: array_push 不适用于关联数组,但使用一元运算符确实有效:
$associativeArray += [$key => $value];
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