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PHP mysqli: reap_async_query() function

mysqli_reap_async_query function / mysqli::reap_async_query

The mysqli_reap_async_query function / mysqli::reap_async_query — Get result from async query

Syntax:

Object oriented style

public mysqli_result mysqli::reap_async_query ( void )

Procedural style

mysqli_result mysqli_reap_async_query ( mysqli $link )

Parameter:

Name Description Required/Optional
link A link identifier returned by mysqli_connect() or mysqli_init() Required for procedural style only and Optional for Object oriented style 
mysqli_reap_async_query ( void );

Return value:

Returns mysqli_result in success, FALSE otherwise.

Version: PHP 5, PHP 7

Example:

<?php
var_dump(mysqli_query($mysqli2, "SELECT SLEEP(0.20)", MYSQLI_ASYNC | MYSQLI_USE_RESULT));
$processed = $loops = 0;
$all = array($mysqli1, $mysqli2);
do {
    $loops++;
    if ($loops > 10) {
        printf("[006] The queries should have finished already\n");
        break;
    }
    $links = $errors = $reject = $all;
    ob_start();
    if (0 == ($ready = mysqli_poll($links, $errors, $reject, 0, 50000))) {
        $tmp = ob_get_contents();
        ob_end_clean();
        if ($tmp != '') {
            printf("Expected error:\n%s\n", $tmp);
            break;
        }
        continue;
    }
    foreach ($links as $link) {
        if ($res = mysqli_reap_async_query($link)) {
            mysqli_free_result($res);
        }
        $processed++;
    }
} while ($processed < 2);
$ready = mysqli_poll($links, $errors, $reject, 0, 50000);
mysqli_close($mysqli1);
mysqli_close($mysqli2);
print "done!";
?>

Sample Output:

NULL [006] The queries should have finished already done!

See also

PHP Function Reference

Previous: real_query
Next: refresh



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PHP: Tips of the Day

var_export(): var_export() dumps a PHP parseable representation of the item.

You can pass true as the second parameter to return the contents into a variable.

Example:

<?php
$myarray = [ "PHP", "Tips" ];
$mystring = "PHP Tips";
$myint = 28;

var_export($myarray);
var_export($mystring);
var_export($myint);
?>

Output:

array (
  0 => 'PHP',
  1 => 'Tips',
)'PHP Tips'28

To put the content into a variable, you can do this:

$array_export = var_export($myarray, true);
$string_export = var_export($mystring, true);
$int_export = var_export($myint, 1); // any `Truthy` value

After that, you can output it like this:

printf('$myarray = %s; %s', $array_export, PHP_EOL);
printf('$mystring = %s; %s', $string_export, PHP_EOL);
printf('$myint = %s; %s', $int_export, PHP_EOL);

Example:

<?php
$myarray = [ "PHP", "Tips" ];
$mystring = "PHP Tips";
$myint = 28;
$array_export = var_export($myarray, true);
$string_export = var_export($mystring, true);
$int_export = var_export($myint, 1);
printf('$myarray = %s; %s', $array_export, PHP_EOL);
printf('$mystring = %s; %s', $string_export, PHP_EOL);
printf('$myint = %s; %s', $int_export, PHP_EOL);
?>

This will produce the following output:

Output:

$myarray = array (
  0 => 'PHP',
  1 => 'Tips',
);
$mystring = 'PHP Tips';
$myint = 28;

 

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