date_default_timezone_set('Europe/Istanbul');
function tarihbul($baslangic,$bitis) { 
$kes1=explode('/',$baslangic); 
$kes2=explode('/',$bitis); 
$time1=mktime(0,0,0,$kes1[1],$kes1[0],$kes1[2]); 
$time2=mktime(0,0,0,$kes2[1],$kes2[0],$kes2[2]); 
echo ($time2-$time1)/86400;
}  
tarihbul('10/04/2015','10/05/2015');

<?php
date_default_timezone_set('Europe/Istanbul');
function tarihbul($baslangic,$bitis) { 
$kes1=explode('/',$baslangic); 
$kes2=explode('/',$bitis); 
$time1=mktime(0,0,0,$kes1[1],$kes1[0],$kes1[2]); 
$time2=mktime(0,0,0,$kes2[1],$kes2[0],$kes2[2]); 
while($time1<=$time2) { 
$x=date('d/m/Y', ($time1)); 
echo $x.'<br>'; 
$time1=$time1+86400; 
}
}  
tarihbul('10/04/2015','10/05/2015');
?>