锟斤拷锟角碉拷学校锟斤拷学锟斤拷锟侥伙拷锟斤拷锟斤拷学知识锟金？就猴拷锟斤拷锟斤拷一锟斤拷锟斤拷
| 锟斤拷锟斤拷 | 锟斤拷锟斤拷 | 锟斤拷锟� |
|---|---|---|
| -$a | 取锟斤拷 | $a 锟侥革拷值锟斤拷 |
| $a + $b | 锟接凤拷 | $a 锟斤拷 $b 锟侥和★拷 |
| $a - $b | 锟斤拷锟斤拷 | $a 锟斤拷 $b 锟侥差。 |
| $a * $b | 锟剿凤拷 | $a 锟斤拷 $b 锟侥伙拷锟斤拷 |
| $a / $b | 锟斤拷锟斤拷 | $a 锟斤拷锟斤拷 $b 锟斤拷锟教★拷 |
| $a % $b | 取模 | $a 锟斤拷锟斤拷 $b 锟斤拷锟斤拷锟斤拷锟斤拷 |
| $a ** $b | Exponentiation | Result of raising $a to the $b'th power. Introduced in PHP 5.6. |
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷欠锟斤拷馗锟斤拷锟斤拷锟斤拷锟街伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟解：锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街凤拷锟斤拷转锟斤拷锟缴碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷
取模锟斤拷锟斤拷锟斤拷牟锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街帮拷锟斤拷锟阶拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺バ★拷锟斤拷锟斤拷郑锟斤拷锟�
取模锟斤拷锟斤拷锟� % 锟侥斤拷锟斤拷捅锟斤拷锟斤拷锟斤拷姆锟斤拷牛锟斤拷锟斤拷锟斤拷牛锟斤拷锟酵拷锟斤拷锟� $a % $b 锟侥斤拷锟斤拷锟� $a 锟侥凤拷锟斤拷锟斤拷同锟斤拷锟斤拷锟界：
<?php
echo (5 % 3)."\n"; // prints 2
echo (5 % -3)."\n"; // prints 2
echo (-5 % 3)."\n"; // prints -2
echo (-5 % -3)."\n"; // prints -2
?>
锟轿硷拷锟街诧拷锟叫碉拷锟斤拷学锟斤拷锟斤拷锟斤拷