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    oci_define_by_name

    (PHP 5, PHP 7, PHP 8, PECL OCI8 >= 1.1.0)

    oci_define_by_name — Associates a PHP variable with a column for query fetches

    Descrizione

    oci_define_by_name(
        resource $statement,
        string $column,
        mixed &$var,
        int $type = 0
    ): bool

    Associates a PHP variable with a column for query fetches using oci_fetch().

    The oci_define_by_name() call must occur before executing oci_execute().

    Elenco dei parametri

    statement

    Un identificativo valido di statement OCI8 creato da oci_parse() e eseguito da oci_execute(), o un identificativo di statement REF CURSOR.

    column

    The column name used in the query.

    Use uppercase for Oracle's default, non-case sensitive column names. Use the exact column name case for case-sensitive column names.

    var

    The PHP variable that will contain the returned column value.

    type

    The data type to be returned. Generally not needed. Note that Oracle-style data conversions are not performed. For example, SQLT_INT will be ignored and the returned data type will still be SQLT_CHR.

    You can optionally use oci_new_descriptor() to allocate LOB/ROWID/BFILE descriptors.

    Valori restituiti

    Restituisce true in caso di successo, false in caso di fallimento.

    Esempi

    Example #1 oci_define_by_name() example

    <?php

    $conn     = oci_connect('hr', 'welcome', 'localhost/XE');
    if (!    $conn) {
    $e = oci_error();
    trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
    }

    $sql = 'SELECT location_id, city FROM locations WHERE location_id < 1200';
    $stid = oci_parse($conn, $sql);

    // The defines MUST be done before executing
    oci_define_by_name($stid, 'LOCATION_ID', $locid);
    oci_define_by_name($stid, 'CITY', $city);

    oci_execute($stid);

    // Each fetch populates the previously defined variables with the next row's data
    while (oci_fetch($stid)) {
    echo     "Location id $locid is $city<br>\n";
    }

    // Displays:
    // Location id 1000 is Roma
    // Location id 1100 is Venice

    oci_free_statement($stid);
    oci_close($conn);

    ?>

    Example #2 oci_define_by_name() with case sensitive column names

    <?php

    /*
    Before running, create the table with a case sensitive column name:
    CREATE TABLE mytab (id NUMBER, "MyDescription" VARCHAR2(30));
    INSERT INTO mytab (id, "MyDescription") values (1, 'Iced Coffee');
    COMMIT;
    */

    $conn = oci_connect('hr', 'welcome', 'localhost/XE');
    if (!    $conn) {
    $e = oci_error();
    trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
    }

    $stid = oci_parse($conn, 'SELECT * FROM mytab');

    // Use uppercase for non case-sensitive column names
    oci_define_by_name($stid, 'ID', $id);

    // Use the exact case for case-sensitive column names
    oci_define_by_name($stid, 'MyDescription', $mydesc);

    oci_execute($stid);

    while (    oci_fetch($stid)) {
    echo     "id $id is $mydesc<br>\n";
    }

    // Displays:
    // id 1 is Iced Coffee

    oci_free_statement($stid);
    oci_close($conn);

    ?>

    Example #3 oci_define_by_name() with LOB columns

    <?php

    /*
    Before running, create the table:
    CREATE TABLE mytab (id NUMBER, fruit CLOB);
    INSERT INTO mytab (id, fruit) values (1, 'apple');
    INSERT INTO mytab (id, fruit) values (2, 'orange');
    COMMIT;
    */

    $conn = oci_connect('hr', 'welcome', 'localhost/XE');
    if (!    $conn) {
    $e = oci_error();
    trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
    }

    $stid = oci_parse($conn, 'SELECT * FROM mytab');

    // The defines MUST be done before executing
    oci_define_by_name($stid, 'ID', $id);
    oci_define_by_name($stid, 'FRUIT', $fruit); // $fruit will become a LOB descriptor

    oci_execute($stid);

    while (    oci_fetch($stid)) {
    echo     $id . " is " . $fruit->load(100) . "<br>\n";
    }

    // Displays:
    // 1 is apple
    // 2 is orange

    $fruit->free();
    oci_free_statement($stid);
    oci_close($conn);

    ?>

    Example #4 oci_define_by_name() with an explicit type

    <?php

    /*
    Before running, create the table:
    CREATE TABLE mytab (id NUMBER, fruit CLOB);
    INSERT INTO mytab (id, fruit) values (1, 'apple');
    INSERT INTO mytab (id, fruit) values (2, 'orange');
    COMMIT;
    */

    $conn = oci_connect('hr', 'welcome', 'localhost/XE');
    if (!    $conn) {
    $e = oci_error();
    trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
    }

    $stid = oci_parse($conn, 'SELECT * FROM mytab');

    // The defines MUST be done before executing
    oci_define_by_name($stid, 'ID', $id);

    $fruit = oci_new_descriptor($conn, OCI_D_LOB);
    oci_define_by_name($stid, 'FRUIT', $fruit, OCI_D_CLOB);

    oci_execute($stid);

    while (    oci_fetch($stid)) {
    echo     $id . " is " . $fruit->load(100) . "<br>\n";
    }

    // Displays:
    // 1 is apple
    // 2 is orange

    $fruit->free();
    oci_free_statement($stid);
    oci_close($conn);

    ?>

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