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November 17, 2015 09:19
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Comprobar si un campo existe en una tabla
From https://www.ma-no.org/es/content/index_mysql-comprobar-si-existen-campo-y-tabla_1561.php
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function existe_campo ($db_conn, $tabla, $campo) { | |
if ($resultado = $db_conn->query('SHOW COLUMNS FROM '.$tabla.' LIKE "'.$campo.'"')) { | |
if($resultado->num_rows() === 1) { | |
return TRUE; | |
} else { | |
return FALSE; | |
} | |
} | |
} | |
$mysqli = new mysqli('localhost', 'mi_usuario', 'mi_contraseña', 'mi_bd'); | |
if ($mysqli->connect_error) { | |
die('Error de Conexión (' . $mysqli->connect_errno . ') ' | |
. $mysqli->connect_error); | |
} | |
$nombre_tabla = 'mi_tabla'; | |
$nombre_campo = 'mi_campo'; | |
if (existe_campo($mysqli, $nombre_tabla, $nombre_campo) ) { | |
echo 'El campo '.$nombre_campo.' existe'; | |
} else { | |
echo 'El campo '.$nombre_campo.'no existe'; | |
} |
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