COMPUTER LEARNING CENTER
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Assignment
=
++
--
+=
-=
*=
/=
%=
|=
&=
^=
.=
Increment and assign
Decrement and assign
Add and assign
Subtract and assign
Multiply and assign
Divide and assign
Take modulus and assign
OR and assign
AND and assign
XOR and assign
Concat and assign
a = b
a++
a--
a += b
a -= b
a *= b
a /= b
a %= b
a |= b
a &= b
a ^= b
a .= b
Allocation
new
Create a new object of a
class
new A()
Selection
? :
If...Then selection
a ? b : c
2.
GIÔÙI THIEÄU TOAÙN TÖÛ
Khi noùi ñeán toaùn töû, chuùng ta luoân lieân töôûng ñeán thöù töï xöû lyù, cuõng nhö
trong toaùn hoïc, toaùn töû trong PHP cuõng co ñoä öu tieân add-subtract-multi-divide.
2.1.
Toaùn töû AND
Khi thöïc hieän moät vieäc taêng leân giaù trò thì baïn söû duïng cuù phaùp nhö sau:
$ i=0;$j=0;
j=i++;// i taêng sau khi gaùn i vaøo j, chính vì vaäy sau khi gaùn i vaøo j, j vaãn
khoâng thay ñoåi
j=++i;// i taêng tröôùc khi gaùn i vaøo j, chính vì vaäy sau khi gaùn i vaøo j, j thay
ñoåi.
Ví duï 3.1: Pheùp toaùn AND.
<HTML>
<HEAD>
<TITLE>::Welcome to PHP</TITLE>
</HEAD>
<BODY>
<h4>AND Operator</h4>
<?php
3-2
