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adobe photoshop cs4 PHP4 practical application experience 6

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Jul 30, 2016 pm 01:29 PM

Author: Sun Movement
Now, you have understood that PHP allows you to nest conditional statements. However, if you look at the example used to demonstrate this concept you will agree that it is both complex and scary.
------------------------------------------------- -------------------------------
if ($day == "Thursday")
{
if ($time == "12")
}
}
?>
------- -------------------------------------------------- -----------------------
　Fortunately, in addition to the comparison operators that we can already use without any restrictions, PHP also provides some logical operations The operator allows you to group conditional statement descriptions together. The table below shows this clearly:
Assume $delta = 12 and $omega = 9
Operator
Meaning
Example
Result
&&
AND
$delta == $gamma && $delta > $omega
True
$delta && $omega False
||
OR
$delta == $gamma || $delta True
$delta > $gamma || $delta False
!
NOT
!$delta
False
less than or equal to
$delta False
　Okay, we can rewrite the code of the above example using logical operators. You see, the following expression Is it simpler?
------------------------------------------------- -------------------------------
if ($day == "Thursday" && $time == "12" && $place == "Italy")
-------------------------------------------------- -----
Simple and elegant? Yes
The above introduces Adobe photoshop cs4 PHP4 practical application experience part 6, including the content of adobe photoshop cs4. I hope it will be helpful to friends who are interested in PHP tutorials.

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