MySQLi_STMT
PHP Manual

mysqli_stmt::prepare

mysqli_stmt_prepare

(PHP 5)

mysqli_stmt::prepare -- mysqli_stmt_preparePrepare a SQL statement for execution

설명

Object oriented style (method)

mixed mysqli_stmt::prepare ( string $query )

Procedure style:

bool mysqli_stmt_prepare ( mysqli_stmt $stmt , string $query )

Prepares the SQL query pointed to by the null-terminated string query.

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

인수

stmt

순차 형식 전용: mysqli_stmt_init()가 반환한 statement 식별자.

query

The query, as a string. It must consist of a single SQL statement.

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

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

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 Language (DML) statements, and not in Data Definition Language (DDL) statements.

반환값

성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.

예제

Example #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();
}

$city "Amersfoort";

/* create a prepared statement */
$stmt =  $mysqli->stmt_init();
if (
$stmt->prepare("SELECT District FROM 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 */
$mysqli->close();
?>

Example #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();
}

$city "Amersfoort";

/* create a prepared statement */
$stmt mysqli_stmt_init($link);
if (
mysqli_stmt_prepare($stmt'SELECT District FROM City WHERE Name=?')) {

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

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

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

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

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

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

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

위 예제의 출력:

Amersfoort is in district Utrecht

참고

mysqli_stmt_init() - Initializes a statement and returns an object for use with mysqli_stmt_prepare, mysqli_stmt_execute() - Executes a prepared Query, mysqli_stmt_fetch() - Fetch results from a prepared statement into the bound variables, mysqli_stmt_bind_param() - Binds variables to a prepared statement as parameters, mysqli_stmt_bind_result() - Binds variables to a prepared statement for result storage mysqli_stmt_close() - Closes a prepared statement.


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