Проверить список URL
 

<?php
	$lines = file('temp.txt', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);

	$multi = curl_multi_init();
	$channels = array();

	foreach ($lines as $line) {
		$ch = curl_init();

		curl_setopt($ch, CURLOPT_URL, $line);
		curl_setopt($ch, CURLOPT_HEADER, false);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

		curl_multi_add_handle($multi, $ch);
 
    	$channels[$line] = $ch;
	}

	$active = null;

	do {
		$mrc = curl_multi_exec($multi, $active);
	} while ($mrc == CURLM_CALL_MULTI_PERFORM);

	while ($active && $mrc == CURLM_OK) {
		if (curl_multi_select($multi) == -1) {
			continue;
		}

		do {
			$mrc = curl_multi_exec($multi, $active);
		} while ($mrc == CURLM_CALL_MULTI_PERFORM);
	}

	foreach ($channels as $channel) {
		echo curl_getinfo($channel, CURLINFO_EFFECTIVE_URL) . ':'. curl_getinfo($channel, CURLINFO_HTTP_CODE) . "\n";
		curl_multi_remove_handle($multi, $channel);
	}


	curl_multi_close($multi);
?>

требуется проверить урлы из файла и вывести коды ответов сервера. как сделать, чтобы редиректы и 404 игнорировались? еще появляется код 0? что это значит?

Куда делись все спецы?

© https://stackoverflow.com/questions/...-code-return-0

Примерно так:

<?php
	$lines = file('temp.txt', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);

	$multi = curl_multi_init();
	$channels = array();

	foreach ($lines as $line) {
		$ch = curl_init();

		curl_setopt($ch, CURLOPT_URL, $line);
		curl_setopt($ch, CURLOPT_HEADER, false);
		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

		curl_multi_add_handle($multi, $ch);
 
    	$channels[$line] = $ch;
	}

	$active = null;

	do {
		$mrc = curl_multi_exec($multi, $active);
	} while ($mrc == CURLM_CALL_MULTI_PERFORM);

	while ($active && $mrc == CURLM_OK) {
		if (curl_multi_select($multi) == -1) {
			continue;
		}

		do {
			$mrc = curl_multi_exec($multi, $active);
		} while ($mrc == CURLM_CALL_MULTI_PERFORM);
	}

	foreach ($channels as $channel) {
        $statusCode = (int) curl_getinfo($channel, CURLINFO_HTTP_CODE);
        if (!in_array($statusCode, [0, 404, 301, 302, 307])) {
            echo curl_getinfo($channel, CURLINFO_EFFECTIVE_URL) . ':'. $statusCode . "\n";
        }
        
		curl_multi_remove_handle($multi, $channel);
	}


	curl_multi_close($multi);
?>

Nexus, благодарю!