2. Multiple lines else if
example:
<?php
$a = 4;
If($a > 5) //No need to add a semicolon here, pay attention!
{
echo "a > 5\n";
}
else if($a > 3)
{
echo "a > 3\n";
}
else
{
echo "a < 5\n";
}
?>
3. Omitting method
<?php
$a = 4
$a > 5 ? $str = "a > 5" : $str = "a < 5" : $str = "a = 5";
echo $str;
?>
While back to circle (Quick Memories English: Bad Mate) Although
(condition1 condition)
{ statement1
statement2
if(condition2 condition)
break
statement3
}
Terminate and break the regulations.
Stop 1 line and continue running.
() Leaving is not necessarily used here, it is very commonly used.
do ...while Do it at least once
do
{
staement1
↓
staement2
}
while(condition)
If the condition condition is true, the program in do will be returned.
example
<?php
do
{
echo $w."<br>";
$w++;
}
while($w<10)
?>
FOR Back to the Circle
example
<?php
for($o=;$o<100;$o++)//There is no semicolon at the end.
{
echo $o."<br>\n";
}
?>
Each word in the foreach array is completed. Array (array)
<?php
$MyArray1 = arry("bad wolf", "good guy", "bad guy", "hehe");
$MyArray1 = arry("1" => "Good person","2" => "Bad person"); //Represents "xxx1" => "Good person",
?>
Learn this first, and then learn tomorrow... I feel a little dizzy... I practice it more if I have time...
Copy the codeThe code is as follows:
<html>
<head>
<title>Bad Wolf Learning PHP Day 3</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<?php
$a= "10"; //Connect the right side to the left side
$a+=”2”; //Add the right side to the left side
echo $a."<br>\n"; //The result here is 12, which roughly means that $a is equal to 10, and then 2 is added to the left (that is $a), so it is 12.
/* No matter what $a represents, it roughly means right to left. "Connect to" or "add to" or "subtract to", etc. */
$b = "Bad Wolf"; //There are several key points that you must remember!; The semicolon should be written, ""It is best to add quotation marks.
$b.= "Great person!";
$b.= "Great person!";
echo $b."Haha!\n";
?>
<br>
<?php
$a= "65896255618562314793123219"; //The calculation is complicated here, it turns out that php processing is simple here!
$a/= "465342233234234"; //Let these 2 numbers be multiplied!
echo $a."←This is the result! 65896255618562314793123219 divided by 465342233234234, ordinary people are not as quick as arithmetic! Haha @!\n"
?>
<br>
<?php
@include(""); //If it does not exist, an error will be reported, but it will not be displayed after adding @!
echo "<br>\n";
?>
<br><br><br>
<?php
$a = 4.998;
If($a > 5) //No need to add a semicolon here, pay attention!
{
echo "By the way!a > 5\n";
}
else //No need to add a semicolon here, pay attention!
{
echo "Wrong!a < 5\n";
}
?>
<br><br><br>
<?php
$a = 4;
If($a > 5) //No need to add a semicolon here, pay attention!
{
echo "a > 5\n";
}
else if($a > 3)
{
echo "a > 3\n";
}
else
{
echo "a < 5\n";
}
?>
<br><br><br>
<?php
$a = 4;
$a > 5 ? $str = "a > 5" : $str = "a < 5";
echo $str;
?>
<br><br><br>
<?php
$p = 0;
while ($p<20)
{
echo $p."<br>";
$p++;
if($p==15)break; //Terminate here to break this regulation.
}
?>
<br><br><br>
<?php
$p = 0;
while ($p<20)
{
$p++;
if($p==15)continue; //Stop here and continue
echo $p."<br>";
}
?>
<br><br><br>
<?php
$w = 999; //If you remove this display 1.2...19
do
{
echo $w."<br>";
$w++;
}
while($w<20)
?>
<br><br><br><br><br><br>
<?php
for($o=0;$o<100;$o++) //There is no semicolon at the end.
{
echo $o."<br>\n";
}
?>
</body>
</html>
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