[英]Create PHP array from MySQL column
mysql_fetch_array
will give me an array of a fetched row. mysql_fetch_array
会给我一个获取行的数组。 What's the best way generate an array from the values of all rows in one column?从一列中所有行的值生成数组的最佳方法是什么?
you could loop through the array, and create a new one, like so:您可以遍历数组,然后创建一个新数组,如下所示:
$column = array();
while($row = mysql_fetch_array($info)){
$column[] = $row[$key];
//Edited - added semicolon at the End of line.1st and 4th(prev) line
}
There is no function to do this using the mysql extension, you can do this:没有使用 mysql 扩展执行此操作的功能,您可以这样做:
$result = array();
while ($row = mysql_fetch_array($r, MYSQL_NUM)) {
$result[] = $row[0];
}
It is apparently marginally faster to fetch the columns in a numerically indexed array, and there is no real benefit here to having the associative array format.获取数字索引数组中的列显然要快一些,并且使用关联数组格式在这里没有真正的好处。
Use a while
loop to get the records and store them in an array:使用while
循环获取记录并将它们存储在数组中:
$array = array();
while ($row = mysql_fetch_array()) {
$array[] = $row['column-x'];
}
Loop through the result:循环遍历结果:
$result = mysql_query(...);
$data = array();
while ($row = mysql_fetch_array($result)) {
array_push($data, $row["columnyouwant"]);
}
$result = mysql_query("SELECT columnname FROM table WHERE x=y");
$columnValues = Array();
while ( $row = mysql_fetch_assoc($result) ) {
$columnValues[] = $row['columnname'];
}
// I'm using this for years and it works very good !! it's easy and logic
$translate = array();
while ($row = mysql_fetch_assoc($result))
{
$cullomnkey = $row['translshort']; // is what you want the key to be
$translate[$cullomnkey] = $row[$language]; // this is the key and the value in the array
}
If you use PDO instead of php-mysql the return value of PDO::query() implements the Traversable interface, meaning you can use it eg with foreach() (unlike the mysql result resource you get from mysql_query).如果您使用PDO而不是 php-mysql,则 PDO::query() 的返回值实现了 Traversable 接口,这意味着您可以将它与 foreach() 一起使用(与您从 mysql_query 获得的 mysql 结果资源不同)。
foreach( $pdo->query('SELECT x,y,z FROM foo') as $row ) {
And in case this does not suffice and you really, really need an array (ie get_class($x)==='Array'), there's the fetchAll() method.如果这还不够,而您确实需要一个数组(即 get_class($x)==='Array'),则可以使用fetchAll()方法。
If none of the above work, try:如果以上都不起作用,请尝试:
while( $row = mysqli_fetch_assoc( $result)){
$array[] = $row['id'];
}
mysql_fetch_assoc is deprecated.
Many years later, just another way.许多年后,只是另一种方式。 I don't know if its performance is better or worse than the while loop method.不知道它的性能比while循环方法好还是差。
For values without commas yo can do:对于没有逗号的值,您可以执行以下操作:
$res = mysql_query("SELECT GROUP_CONCAT(colname) AS values FROM tablename");
$row = mysql_fetch_assoc($res);
$arrOfValues = explode(',', $row['values']);
For a generic solution, you may use a separator:对于通用解决方案,您可以使用分隔符:
$res = mysql_query("SELECT GROUP_CONCAT(colname SEPARATOR '##_sep_##') AS values FROM tablename");
$row = mysql_fetch_assoc($res);
$arrOfValues = explode('##_sep_##', $row['values']);
$query = mysql_query('SELECT * from yourTable');
function mysql_field_array( $query ) {
$field = mysql_num_fields( $query );
for ( $i = 0; $i < $field; $i++ ) {
$names[] = mysql_field_name( $query, $i );
}
return $names;
}
$fields = mysql_field_array( $query );
$output = implode( ',', $fields ); //outputs the columns names
//echo count( $fields ); //this use if you want count of columns.
$columns = '{\"fields\":\".json_encode($output).\"}';
echo $columns; //for JSON output
you can do this :你可以这样做 :
$columns = array();
$i=1;
while( $row = mysql_fetch_array($sql) )
{
$columns [$i]=$row['value'];
$i++;
}
If you don't need other information in that table, you can query for only the column you need and it makes it all more easy:如果您不需要该表中的其他信息,您可以只查询您需要的列,这样就更容易了:
$query = mysql_query("SELECT * FROM table WHERE id='$int' LIMIT 1");
$column = array();
$column = mysql_fetch_array($query);
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