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mysqli_result::fetch_column

mysqli_fetch_column

(PHP 8 >= 8.1.0)

mysqli_result::fetch_column -- mysqli_fetch_columnFetch a single column from the next row of a result set

Descrição

Estilo orientado à objeto

public mysqli_result::fetch_column(int $column = 0): null|int|float|string|false

Estilo procedural

mysqli_fetch_column(mysqli_result $result, int $column = 0): null|int|float|string|false

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 função assimila campos NULL para o o null do PHP.

Parâmetros

result

Somente no estilo procedural: Um recurso result set retornado por mysqli_query(), mysqli_store_result() ou mysqli_use_result().

column

0-indexed number of the column you wish to retrieve from the row. If no value is supplied, the first column will be returned.

Valor Retornado

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

Aviso

There is no way to return another column from the same row if you use this function to retrieve data.

Exemplos

Exemplo #1 mysqli_result::fetch_column() example

Estilo orientado à objeto

<?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 procedural

<?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 ($Name mysqli_fetch_column($result1)) {
    
printf("%s\n"$Name);
}

Os exemplos acima irão imprimir algo similar à:

Rafah
Nablus
Jabaliya
Hebron
Khan Yunis

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