mysqli_result::$lengths

(PHP 5, PHP 7)

Returns the lengths of the columns of the current row in the result set

array mysqli_fetch_lengths ( mysqli_result $result )

Object oriented style

array $mysqli_result->lengths;

Procedural style

The mysqli_fetch_lengths() function returns an array containing the lengths of every column of the current row within the result set.

Parameters:

result

Procedural style only: A result set identifier returned by mysqli_query(), mysqli_store_result() or mysqli_use_result().

Returns:

An array of integers representing the size of each column (not including any terminating null characters). FALSE if an error occurred.

mysqli_fetch_lengths() is valid only for the current row of the result set. It returns FALSE if you call it before calling mysqli_fetch_row/array/object or after retrieving all rows in the result.

Examples:

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();
}
 
$query = "SELECT * from Country ORDER BY Code LIMIT 1";
 
if ($result = $mysqli->query($query)) {
 
    $row = $result->fetch_row();
 
    /* display column lengths */
    foreach ($result->lengths as $i => $val) {
        printf("Field %2d has Length %2d\n", $i+1, $val);
    }
    $result->close();
}
 
/* close connection */
$mysqli->close();
?>

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();
}
 
$query = "SELECT * from Country ORDER BY Code LIMIT 1";
 
if ($result = mysqli_query($link, $query)) {
 
    $row = mysqli_fetch_row($result);
 
    /* display column lengths */
    foreach (mysqli_fetch_lengths($result) as $i => $val) {
        printf("Field %2d has Length %2d\n", $i+1, $val);
    }
    mysqli_free_result($result);
}
 
/* close connection */
mysqli_close($link);
?>

The above examples will output:

Field  1 has Length  3
Field  2 has Length  5
Field  3 has Length 13
Field  4 has Length  9
Field  5 has Length  6
Field  6 has Length  1
Field  7 has Length  6
Field  8 has Length  4
Field  9 has Length  6
Field 10 has Length  6
Field 11 has Length  5
Field 12 has Length 44
Field 13 has Length  7
Field 14 has Length  3
Field 15 has Length  2

Links:

http://php.net/manual/en/mysqli-result.lengths.php

doc_php

2025-01-10 15:47:30

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