Umthambo we-PHP kunye nesisombululo sekhosi yoqeqesho esiSiseko se-PHP

Inani eliphambili linani elipheleleyo elingaphezulu kuno-1 okuphela kwezahluli ngu-1 kwaye ngokwakhe, njengo -2, 3, 5, 7, 11, njl.

Umzekelo, u-17 linani eliyiprime number kuba lahlulwa ngo-1 no-17 kuphela. Noko ke, u-18 akalonani eliphambili kuba lahlulwa ngo-2, 3, 6, 9 kunye nenani ngokwalo. Ezi ziindlela ezininzi zokuprinta inani eliphambili phakathi kwe-1 kunye ne-100 kulwimi lweprogram ye-PHP.

Le khowudi ilandelayo iprinta uluhlu lwamanani aphambili phakathi ko-1 kunye no-50 (oko kukuthi, amanani angohlulwayo yiyo nantoni na ngaphandle ko-1 okanye inani ngokwalo) usebenzisa i-loop yaxa.

<?php 
$limit = 50;
$init = 2;
	
while(TRUE)
{
	$div = 2;
	if($init > $limit) 
	{
		break;
	}
	while(TRUE)
	{
		if($div > sqrt($init))
		{
			echo $init."  ";
			break;
		}
		if($init % $div == 0) 
		{
			break;
		}
		$div = $div + 1;
	}
	$init = $init + 1;
}

Kwisisombululo sinee-loops ezimbini ngelixa. Uvavanyo lwangaphakathi ngelixa loop nayo yonke isahluli esinokwenzeka. Ukuba i-loop yangaphakathi ifumana isahluli, inani aliyiyo i-prime, ngoko liyayeka ngaphandle kokushicilela nantoni na, kwaye ukuba uvavanyo luhamba yonke indlela ukuya kwingcambu yenani, sinokucinga ukuba inani liyiprime. Umjikelo wangaphandle uhamba kuwo onke amanani phakathi kwe-1 kunye ne-50. Le loop yophukile xa sifikelele kwindawo yoqhawulo lwamanani ukuvavanya.