PHP mysqli_result fetch_column() Method

The PHP mysqli_result::fetch_column() / mysqli_fetch_column() function is used to fetch one row of data from the result set and returns the 0-indexed column. Each subsequent call to this function will return the value from the next row within the result set, or false if there are no more rows.

Syntax

//Object-oriented style
public mysqli_result::fetch_column(column)

//Procedural style
mysqli_fetch_column(result, column)

Parameters

`result`	`Required.` For procedural style only: Specify a mysqli_result object returned by mysqli_query(), mysqli_store_result(), mysqli_use_result() or mysqli_stmt_get_result().
`column`	`Optional.` Specify the index number of the column which need to be retrieved from the row. If no value is supplied, the first column will be returned.

Return Value

Returns a single column from the next row of a result set or false if there are no more rows.

Example: Object-oriented style

The example below shows the usage of mysqli_result::fetch_column() method.

<?php
//establishing connection to the database
$mysqli = new mysqli("localhost", "user", "password", "database");
if ($mysqli->connect_errno) {
  echo "Failed to connect to MySQL: ". $mysqli->connect_error;
  exit();
}

//getting query result from the database
$sql = "SELECT EmpID, Name, Age FROM Employee ORDER BY Age";
$result = $mysqli->query($sql);

//closing the connection
$mysqli->close();

//processing the data retrieved from the database
//- fetching a single value from the second column
while($Name = $result->fetch_column(1)) {
  printf("%s\n", $Name);
}
?>

The output of the above code will be similar to:

Marry
Kim
John
Adam

Example: Procedural style

The example below shows the usage of mysqli_fetch_column() function.

<?php
//establishing connection to the database
$mysqli = mysqli_connect("localhost", "user", "password", "database");
if (mysqli_connect_errno()) {
  echo "Failed to connect to MySQL: ". mysqli_connect_error();
  exit();
}

//getting query result from the database
$sql = "SELECT EmpID, Name, Age FROM Employee ORDER BY Age";
$result = mysqli_query($mysqli, $sql);

//closing the connection
mysqli_close($mysqli);

//processing the data retrieved from the database
//- fetching a single value from the second column
while($Name = mysqli_fetch_column($result, 1)) {
  printf("%s\n", $Name);
}
?>

The output of the above code will be similar to:

Marry
Kim
John
Adam

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