(PHP 8 >= 8.1.0)
mysqli_result::fetch_column -- mysqli_fetch_column — Fetch a single column from the next row of a result set
Estilo orientado a objetos
Estilo por procedimientos
Fetches 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.
Nota: Esta función define campos NULOS al valor
nullde PHP.
resultSólo estilo por procedimientos: Un conjunto de identificadores de resultados devuelto por mysqli_query(), mysqli_store_result() o mysqli_use_result().
column0-indexed number of the column you wish to retrieve from the row. If no value is supplied, the first column will be returned.
Returns a single column
from the next row of a result set or false if there are no more rows.
There is no way to return another column from the same row if you use this function to retrieve data.
Ejemplo #1 mysqli_result::fetch_column() example
Estilo orientado a objetos
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
$query = "SELECT CountryCode, Name FROM City ORDER BY ID DESC LIMIT 5";
$result = $mysqli->query($query);
/* fetch a single value from the second column */
while ($Name = $result->fetch_column(1)) {
printf("%s\n", $Name);
}Estilo por procedimientos
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = mysqli_connect("localhost", "my_user", "my_password", "world");
$query = "SELECT CountryCode, Name FROM City ORDER BY ID DESC LIMIT 5";
$result = mysqli_query($mysqli, $query);
/* fetch a single value from the second column */
while ($Name = mysqli_fetch_column($result, 1)) {
printf("%s\n", $Name);
}El resultado de los ejemplos sería algo similar a:
Rafah Nablus Jabaliya Hebron Khan Yunis