$ wpdb-> get_row () solo devuelve una sola fila?

De hecho,use get_row() solo cuandoespere obtener un resultado; de lo contrario,puede usar get_results()

Indeed, use get_row() only when you expect to get one result, else you can use get_results()

Haytresformas deextraer datos de labase de datos.

1. $wpdb->get_var: useestopara obtener un valor único de latabla de labase de datos. Como si quisieras contarelnúmerototal de comentarios. Puedes hacerlo de la siguientemanera:

 <?php 
$comment_count = $wpdb->get_var($wpdb->prepare("SELECT COUNT(*) FROM $wpdb->comments;")); 
echo '<p>Total comments: ' . $comment_count . '</p>';
?>
 

2. $wpdb->get_row:para recuperar unafila completa de latabla,puede usaresto.

<"Ejemplo:

 <?php 
$thepost = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = 1" ) );
echo $thepost->post_title; 
?>
 

O

 <?php 
$thepost = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = 1" ), ARRAY_A );
print_r ($thepost); 
?>
 

Al usarelparámetro ARRAY_Aen get_row,los datos de lapublicación se devuelven como unamatriz asociativa. Alternativamente,puede usarelparámetro ARRAY_Npara devolver los datos de supublicaciónen unamatrizindexadanuméricamente.

3. $wpdb->get_results: las consultas SELECTestándar deben usar lafunciónget_resultspara recuperarmúltiplesfilas de datos de labase de datos.

 <?php 
global $wpdb;
$allposts = $wpdb->get_results( $wpdb->prepare("SELECT ID, post_title FROM $wpdb->posts WHERE post_status = 'publish'") );
foreach ($allposts as $singlepost) { 
         echo '<p>' .$singlepost->post_title. '</p>';
}
?>
 

ynecesitael último,comopuedeesperar.

There are three ways to pull data from the database.

1.$wpdb->get_var:use this to get a single value from the database table. Like if you want to count the total number of comments. You can do it in following way:

<?php 
$comment_count = $wpdb->get_var($wpdb->prepare("SELECT COUNT(*) FROM $wpdb->comments;")); 
echo '<p>Total comments: ' . $comment_count . '</p>';
?>

2.$wpdb->get_row : To retrieve an entire table row you can use this.

Example:

<?php 
$thepost = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = 1" ) );
echo $thepost->post_title; 
?>

OR

<?php 
$thepost = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = 1" ), ARRAY_A );
print_r ($thepost); 
?>

By using the ARRAY_A parameter in get_row your post data is returned as an associative array. Alternatively, you could use the ARRAY_N parameter to return your post data in a numerically indexed array.

3.$wpdb->get_results:Standard SELECT queries should use the get_results function for retrieving multiple rows of data from the database.

<?php 
global $wpdb;
$allposts = $wpdb->get_results( $wpdb->prepare("SELECT ID, post_title FROM $wpdb->posts WHERE post_status = 'publish'") );
foreach ($allposts as $singlepost) { 
         echo '<p>' .$singlepost->post_title. '</p>';
}
?>

and you need the last one, as you can expect.

 $wpdb->get_row('query', output_type, row_offset);
 

row_offset (entero) Lafila deseada (siendo 0 laprimera).El valorpredeterminadoes 0.

va http://codex.wordpress.org/Class_Reference/wpdb

$wpdb->get_row('query', output_type, row_offset);

row_offset (integer) The desired row (0 being the first). Defaults to 0.

va http://codex.wordpress.org/Class_Reference/wpdb

mi soluciónes simple ..

 <?php
function count_results() {
    # use the data base
    global $wpdb;

    # Query to count all results from one table
    $sql_count_results = '
        SELECT count(*) as count
        FROM `YOUR_TABLE`;';

    # Ejecute function
    $results = $wpdb->get_row( $sql_count_results , OBJECT );

    # Return results
    return $results->count;
}
 

Uso:

 <?php
echo count_results();
 

my solution is simple..

<?php
function count_results() {
    # use the data base
    global $wpdb;

    # Query to count all results from one table
    $sql_count_results = '
        SELECT count(*) as count
        FROM `YOUR_TABLE`;';

    # Ejecute function
    $results = $wpdb->get_row( $sql_count_results , OBJECT );

    # Return results
    return $results->count;
}

Use:

<?php
echo count_results();