mysqli_result->lengthsmysqli_result->num_rows
mysqli_num_rows
(PHP 5)
mysqli_result->num_rows -- mysqli_num_rows — Gets the number of rows in a result
Descrição
Object oriented style (property):
Procedural style:
Returns the number of rows in the result set.
The use of mysqli_num_rows() depends on whether you use buffered or unbuffered result sets. In case you use unbuffered resultsets mysqli_num_rows() will not return the correct number of rows until all the rows in the result have been retrieved.
Parâmetros
- result
-
Apenas para estilo de procedimento: Um identificador de um conjunto de resultados retornado por mysqli_query(), mysqli_store_result() ou mysqli_use_result().
Valor Retornado
Returns number of rows in the result set.
Nota: If the number of rows is greater than maximal int value, the number will be returned as a string.
Exemplos
Exemplo #1 Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
if ($result = $mysqli->query("SELECT Code, Name FROM Country ORDER BY Name")) {
/* determine number of rows result set */
$row_cnt = $result->num_rows;
printf("Result set has %d rows.\n", $row_cnt);
/* close result set */
$result->close();
}
/* close connection */
$mysqli->close();
?>
Exemplo #2 Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
if ($result = mysqli_query($link, "SELECT Code, Name FROM Country ORDER BY Name")) {
/* determine number of rows result set */
$row_cnt = mysqli_num_rows($result);
printf("Result set has %d rows.\n", $row_cnt);
/* close result set */
mysqli_free_result($result);
}
/* close connection */
mysqli_close($link);
?>
O exemplo acima irá imprimir:
Result set has 239 rows.
Veja Também
- mysqli_affected_rows() - Retorna o número de linhas afetadas pela operação MySQL anterior
- mysqli_store_result() - Transfers a result set from the last query
- mysqli_use_result() - Initiate a result set retrieval
- mysqli_query() - Performs a query on the database
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