mysqli_fetch_field

Returns the next field in the result set (PHP 5)
object mysqli_fetch_field ( mysqli_result result )

Example 1495. Object oriented style

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<?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();

}

$query = "SELECT Name, SurfaceArea from Country ORDER BY Code LIMIT 5";


if ($result = $mysqli->query($query)) {


    /* Get field information for all columns */

    while ($finfo = $result->fetch_field()) {


        printf("Name:     %s\n", $finfo->name);

        printf("Table:    %s\n", $finfo->table);

        printf("max. Len: %d\n", $finfo->max_length);

        printf("Flags:    %d\n", $finfo->flags);

        printf("Type:     %d\n\n", $finfo->type);

    }

    $result->close();

}

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

Example 1496. Procedural style

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<?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();

}

$query = "SELECT Name, SurfaceArea from Country ORDER BY Code LIMIT 5";


if ($result = mysqli_query($link, $query)) {


    /* Get field information for all fields */

    while ($finfo = mysqli_fetch_field($result)) {


        printf("Name:     %s\n", $finfo->name);

        printf("Table:    %s\n", $finfo->table);

        printf("max. Len: %d\n", $finfo->max_length);

        printf("Flags:    %d\n", $finfo->flags);

        printf("Type:     %d\n\n", $finfo->type);

    }

    mysqli_free_result($result);

}

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

Code Examples / Notes » mysqli_fetch_field

dedlfix

There are MYSQLI_TYPE_* constants for the type property (listed in http://php.net/manual/en/ref.mysqli.php). e.g. <?php if ($finfo->type == MYSQLI_TYPE_VAR_STRING) // a VARCHAR

marc-andrÃ©

The "type" property will return a numerical representation of a field type instead of a "meaningful" string. Here is an array that may help you: <?php $mysqli_type = array(); $mysqli_type[0] = "decimal"; $mysqli_type[1] = "tinyint"; $mysqli_type[2] = "smallint"; $mysqli_type[3] = "int"; $mysqli_type[4] = "float"; $mysqli_type[5] = "double"; $mysqli_type[7] = "timestamp"; $mysqli_type[8] = "bigint"; $mysqli_type[9] = "mediumint"; $mysqli_type[10] = "date"; $mysqli_type[11] = "time"; $mysqli_type[12] = "datetime"; $mysqli_type[13] = "year"; $mysqli_type[252] = "blob"; // text, blob, tinyblob,mediumblob, etc... $mysqli_type[253] = "string"; // varchar and char $mysqli_type[254] = "enum"; ?>

jonathan

Some corrections ;o) $mysqli_type = array(); $mysqli_type[0] = "DECIMAL"; $mysqli_type[1] = "TINYINT"; $mysqli_type[2] = "SMALLINT"; $mysqli_type[3] = "INTEGER"; $mysqli_type[4] = "FLOAT"; $mysqli_type[5] = "DOUBLE"; $mysqli_type[7] = "TIMESTAMP"; $mysqli_type[8] = "BIGINT"; $mysqli_type[9] = "MEDIUMINT"; $mysqli_type[10] = "DATE"; $mysqli_type[11] = "TIME"; $mysqli_type[12] = "DATETIME"; $mysqli_type[13] = "YEAR"; $mysqli_type[14] = "DATE"; $mysqli_type[16] = "BIT"; $mysqli_type[246] = "DECIMAL"; $mysqli_type[247] = "ENUM"; $mysqli_type[248] = "SET"; $mysqli_type[249] = "TINYBLOB"; $mysqli_type[250] = "MEDIUMBLOB"; $mysqli_type[251] = "LONGBLOB"; $mysqli_type[252] = "BLOB"; $mysqli_type[253] = "VARCHAR"; $mysqli_type[254] = "CHAR"; $mysqli_type[255] = "GEOMETRY";

jakerosoft

<? $fieldinfo = $result->fetch_field(); if ($fieldinfo & MYSQLI_NOT_NULL_FLAG) { print "not null flag is set"; } else { print "not null flag is NOT set"; } ?>

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mysqli_fetch
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mysqli_field_seek
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mysqli_free_result
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