php教程

SQLite3Result 类

(PHP 5 >= 5.3.0, PHP 7)

简介

处理 SQLite 3 扩展返回结果集的类。

类摘要

SQLite3Result {
/* 方法 */
public columnName ( int $column_number ) : string
public columnType ( int $column_number ) : int
public fetchArray ([ int $mode = SQLITE3_BOTH ] ) : array
public finalize ( void ) : bool
public numColumns ( void ) : int
public reset ( void ) : bool
}

Table of Contents

User Contributed Notes

jan at bootfinder dot co dot uk 10-Oct-2014 03:43
I use the following code to get num_rows:

<?php
...
$nrows = 0;
$result->reset();
while (
$result->fetchArray())
   
$nrows++;
$result->reset();
return
$nrows;
...
?>
sameers dot public at gmail dot com 23-May-2014 05:30
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.
alan71-at-free-fr 28-Dec-2010 06:34
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
claudiu at virtuamagic dot com 08-Mar-2010 02:34
fetchArray() will return bool(false) in case of 0 rows.
jonscully at gmail dot com 30-Nov-2009 01:35
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

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