Валентин

$newtext = wordwrap($arr['fullpromo'], 30, "<br>");

$temp  = 1192343222343443 * 1000000;
// 1.1923432223434E+21
$temp_format = number_format($temp, 2, '.', '');
// 1192343222343442890752.00
$temp_format1 = sprintf('%.2f', $temp);
// 1192343222343442890752.00

UPDATE table SET uid = CASE
    WHEN id = 1 THEN 2952
    WHEN id = 2 THEN 4925
    WHEN id = 3 THEN 1592
    ELSE uid
    END
WHERE id IN (1,2,3)

$postdata = http_build_query(
    array(
        'var1' => 'some content',
        'var2' => 'doh'
    )
);

$opts = array(
  'http'=>array(
    'method'=>"POST",
    'header'=>"Accept-language: en\r\n" .
              "Cookie: foo=bar\r\n" .
              "User-agent: BROWSER-DESCRIPTION-HERE\r\n"
  ),
    'content' => $postdata
);

$context = stream_context_create($opts);
$file = file_get_contents('http://www.example.com/', false, $context);

$curl_h = curl_init('http://www.example.com/');

curl_setopt($curl_h, CURLOPT_HTTPHEADER,
    array(
        'User-Agent: BROWSER-DESCRIPTION-HERE',
    )
);
curl_setopt($curl_h, CURLOPT_POST, 1);
curl_setopt($resource, CURLOPT_POSTFIELDS, array('key' => '123213'));
curl_setopt($curl_h, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($curl_h);

// символы которые находится между id и user заменяем на символ *
preg_replace('/(?<=id)(.*?)(?=user))/is', '$1 * $3', $str)

$opts = array('http' =>
	array(
		'method'  => 'GET',
		'header'  => array(
			'Accept-Language: ru-Ru,ru;q=0.8',
			'User-Agent: '.$_SERVER['HTTP_USER_AGENT'],
		)
	)
);

$context  = stream_context_create($opts);
echo file_get_contents('https://sbonhelp.ru/registraciya-v-sberbank-online', false, $context);