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Php maxdb prepare () function

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(no version information, might be only in CVS)

maxdb_prepare

(no version information, might be only in CVS)

maxdb->prepare --  Prepare a SQL statement for execution

Syntax

Procedure style:

mixed maxdb_prepare ( resource link, string query )

Object oriented style (method)

class stmt {

mixed 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.

Note: 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.

Note: 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.

Return Values

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

Example

Example 1. Object oriented style

<?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();
?>

Example 2. Procedural style

<?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);
?>

The above examples would produce the following output:

Rosemont is in district IL

Php maxdb prepare Function syntax tag

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Php maxdb prepare syntax tutorial

php tutorial guide and code design are for easy learning and programming. The code practice section provided at the top is for practising of this syntax. Use the code section up to practice your php programming online. Learning php is very easy, all you need is to use the examples on this site and practice them to perfect your skills.


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