PHP 8.4.2 Released!

    SQLite3Result 类

    (PHP 5 >= 5.3.0, PHP 7, PHP 8)

    简介

    处理 SQLite 3 扩展返回结果集的类。

    类摘要

    class SQLite3Result {
    /* 方法 */
    private __construct()
    public columnName(int $column): string|false
    public columnType(int $column): int|false
    public fetchArray(int $mode = SQLITE3_BOTH): array|false
    public finalize(): true
    public numColumns(): int
    public reset(): bool
    }

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    用户贡献的备注 5 notes

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    15
    jonscully at gmail dot com
    15 years ago
    Since SQLite3Result::numRows is unavailable, use:

    <?php
    if ($res->numColumns() && $res->columnType(0) != SQLITE3_NULL) {
    // have rows
    } else {
    // zero rows
    }
    ?>

    Because when there are zero rows:
    * SQLite3Result::fetchArray will return '1'
    * SQLite3Result::numColumns will return '1'
    * Column type for column '0' will be SQLITE3_NULL
    up
    4
    sameers dot public at gmail dot com
    10 years ago
    According to http://www.php.net/manual/en/sqlite3result.columntype.php, and also per my experience, columnType() doesn't return anything other than SQLITE3_NULL. Consequently, the test suggested in the comment that tries to identify whether a column is NULL is incorrect.

    The right thing to do appears to be to test if ($result->fetchArray())[0] == null.
    up
    3
    jan at bootfinder dot co dot uk
    10 years ago
    I use the following code to get num_rows:

    <?php
    ...
    $nrows = 0;
    $result->reset();
    while (    $result->fetchArray())
    $nrows++;
    $result->reset();
    return     $nrows;
    ...
    ?>
    up
    2
    atesin () 6m4i1 ! com
    3 years ago
    in response to jan at bootfinder dot co dot uk (comment #115891) about getting num_rows...

    how about (not tested)... ?

    <?php // do cleans before and after if needed

    for ( $nrows = 0; isarray($result->fetchArray()); ++$nrows );
    return     $nrows;

    ?>
    up
    0
    alan71-at-free-fr
    13 years ago
    Here's a snippet that might help you to write a fetchObject function that is also missing:

    <?php

    function fetchObject($sqlite3result, $objectType = NULL) {
    $array = $sqlite3result->fetchArray();

    if(    is_null($objectType)) {
    $object = new stdClass();
    } else {
    // does not call this class' constructor
    $object = unserialize(sprintf('O:%d:"%s":0:{}', strlen($objectType), $objectType));
    }

    $reflector = new ReflectionObject($object);
    for(    $i = 0; $i < $sqlite3result->numColumns(); $i++) {
    $name = $sqlite3result->columnName($i);
    $value = $array[$name];

    try {
    $attribute = $reflector->getProperty($name);

    $attribute->setAccessible(TRUE);
    $attribute->setValue($object, $value);
    } catch (    ReflectionException $e) {
    $object->$name = $value;
    }
    }

    return     $object;
    }

    ?>

    Heavily inspired of Bergmann's Object Freezer :
    https://github.com/sebastianbergmann/php-object-freezer/blob/master/Object/Freezer.php
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