Ayyuka na PHP tare da PHP Basic horo bayani

Babban lamba ita ce lamba mafi girma fiye da 1 wanda kawai masu rarraba su ne 1 da kanta, kamar -2, 3, 5, 7, 11, da dai sauransu.

Misali, 17 babban lamba ne domin ana iya raba shi da 1 da 17. Duk da haka, 18 ba babbar lamba ba ce saboda ana iya rarraba ta 2, 3, 6, 9 da lambar kanta. Waɗannan hanyoyi ne da yawa don buga babban lamba tsakanin 1 zuwa 100 a cikin yaren shirye-shiryen PHP.

Lambar da ke gaba tana buga jerin manyan lambobi tsakanin 1 zuwa 50 (wato, lambobi waɗanda ba a raba su da wani abu banda 1 ko lambar kanta) ta amfani da madauki na ɗan lokaci.

<?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;
}

A cikin bayani muna da biyu yayin da madaukai. Madauki na ciki yayin da madauki yayi gwajin tare da kowane mai iya rarrabawa. Idan madauki na ciki ya sami mai rarrabawa, lambar ba ta farko ba ce, don haka yana tsayawa ba tare da buga komai ba, kuma idan gwajin ya tafi har zuwa tushen murabba'in lambar, zamu iya ɗauka lambar ta zama firam. Madauki na waje yana gudana ta duk lambobi tsakanin 1 zuwa 50. Wannan madauki yana karye ne lokacin da muka kai matakin karya lambobin da za a gwada.