PHP Australia Conference 2015

maxdb_prepare

maxdb::prepare

(PECL maxdb >= 1.0)

maxdb_prepare -- maxdb::preparePrepare an SQL statement for execution

Descripción

Estilo por procedimientos

resource maxdb_prepare ( resource $link , string $query )

Estilo orientado a objetos

maxdb_stmt maxdb::prepare ( string $query )

maxdb_prepare() prepares the SQL query pointed to by the null-terminated string query, and returns a statement handle to be used for further operations on the statement. The query must consist of a single SQL statement.

Nota:

You should not add a terminating semicolon or \g to the statement.

The parameter query can include one or more parameter markers in the SQL statement by embedding question mark (?) characters at the appropriate positions.

Nota:

The markers are legal only in certain places in SQL statements. For example, they are allowed in the VALUES() list of an INSERT statement (to specify column values for a row), or in a comparison with a column in a WHERE clause to specify a comparison value.

However, they are not allowed for identifiers (such as table or column names), in the select list that names the columns to be returned by a SELECT statement), or to specify both operands of a binary operator such as the = equal sign. The latter restriction is necessary because it would be impossible to determine the parameter type. In general, parameters are legal only in Data Manipulation Languange (DML) statements, and not in Data Defination Language (DDL) statements.

The parameter markers must be bound to application variables using maxdb_stmt_bind_param() and/or maxdb_stmt_bind_result() before executing the statement or fetching rows.

Valores devueltos

maxdb_prepare() returns a statement resource or FALSE if an error occurred.

Ejemplos

Ejemplo #1 Estilo orientado a objetos

<?php
$maxdb 
= new maxdb("localhost""MONA""RED""DEMODB");

/* check connection */
if (maxdb_connect_errno()) {
   
printf("Connect failed: %s\n"maxdb_connect_error());
   exit();
}

$city "Rosemont";

/* create a prepared statement */
if ($stmt $maxdb->prepare("SELECT state FROM hotel.city WHERE name=?")) {

   
/* bind parameters for markers */
   
$stmt->bind_param("s"$city);

   
/* execute query */
   
$stmt->execute();

   
/* bind result variables */
   
$stmt->bind_result($district);

   
/* fetch value */
   
$stmt->fetch();

   
printf("%s is in district %s\n"$city$district);

   
/* close statement */
   
$stmt->close();
}

/* close connection */
$maxdb->close();
?>

Ejemplo #2 Estilo por procedimientos

<?php
$link 
maxdb_connect("localhost""MONA""RED""DEMODB");

/* check connection */
if (maxdb_connect_errno()) {
   
printf("Connect failed: %s\n"maxdb_connect_error());
   exit();
}

$city "Rosemont";

/* create a prepared statement */
if ($stmt maxdb_prepare($link"SELECT state FROM hotel.city WHERE name=?")) {

   
/* bind parameters for markers */
   
maxdb_stmt_bind_param($stmt"s"$city);

   
/* execute query */
   
maxdb_stmt_execute($stmt);

  
/* bind result variables */
   
maxdb_stmt_bind_result($stmt$district);

   
/* fetch value */
   
maxdb_stmt_fetch($stmt);

   
printf("%s is in district %s\n"$city$district);

   
/* close statement */
   
maxdb_stmt_close($stmt);
}

/* close connection */
maxdb_close($link);
?>

El resultado del ejemplo sería algo similar a:

Rosemont is in district IL

Ver también

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top