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1 echo();2 print();3 die();4 printf();5 sprintf();6 print_r();7 var_dump();
1 echo()
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2 print()
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mysql_connect("locahost","root","root") or die("Á´½Ó·þÎñÆ÷ʧ°Ü£¡");
4 printf();
printf("²ÎÊý1",²ÎÊý2)£º²ÎÊý1=°´Ê²Ã´¸ñʽÊä³ö£»²ÎÊý2=Êä³öµÄ±äÁ¿¡£($s:°´×Ö·û´®;$d:°´ÕûÐÍ;$b:°´¶þ½øÖÆ£»$x:°´16½øÖÆ£»$o:°´°Ë½øÖÆ; $f:°´¸¡µãÐÍ)
<?php
$num=100.001;
printf("%d",$num); //100
printf("%s",$num); //100.001
printf("%s---%d---%b---%x---%o---%f",$num,$num,$num,$num,$num,$num)
//100.001---100---1100100---64---144---1001.00100
printf("%.2f",$num); //100.00 (СÊýµã±£Áô2λ)
printf("%.1f",$num); //100.0 (СÊýµã±£Áô1λ)
printf("%`#10s",$num); //###100.001
printf("%`@10s",$num); //@@@100.001
printf("%`_10s",$num); //___100.001
printf("%`#-10s",$num); //100.001###
printf("%`@-10s",$num); //100.001@@@
printf("%`_-10s",$num); //100.001___
printf("%`#20s",$num); //#############100.001
?>
5 sprintf();
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<?php
$num=100.001;
$a=sprintf("%d",$num);
echo $a; //100
?>
6 print_r();
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