PHP Tutorial (funtion)

1
PHP
 echo, print

 echo (variable
functions)


2
PHP
 echo, print
Demo
<? #ecpr.php
function TestSet($a){
print("$a is $a");
}
$iTestSet = "TestSet";
$iTestSet(5);
?>

3
PHP
 settype()
 data type

 settype($varname, “datatype”);
Demo
<? #settype.php
settype($i, "integer");
?>

4
PHP
 gettype()
 data type

 gettype($varname);
Demo
<? #settype.php
print(gettype($i));
?>

5
PHP
 isset()
 ( = 1, =
blank)

 isset($varname);
Demo
<? #isset.php
print(gettype($i));
print("<br>".isset($a));
print("<br>".isset($i));
?>

6
Introduction to HTML
 HTML
<html>
<head>

</head>
<body>
</body>
</html>

7
 HTML
<html>
<head>

</head>

<body>
<h1>php with html</h1>
<?php
//---
print "PHP with HTML";
?>
<form>
<?php
//---
?>
</form>
</body>
</html>

8
 HTML

<html>
<head>
<title>MyHTML</title>
</head>
<body>
</body>
</html>

9
 HTML
background
background
bgcolor background
text foreground
events onLoad, onUpload

10
 form
Action URL submit
Method
Get URL
URL
browser
POST URL
Name
control
<input>
<textarea>

11
 input type
 text
 password
 button
 reset
 submit
 radio
 checkbox
 hidden

12
 input
type
user
name
Value

13
 input - text
name
value
size
maxlength
events onChange, onKeyUp

14
 input - password
name
value
(encrypted)
size
maxlength

15
 input – button, reset, submit
name
value

16
 input – radio, checkbox
name
value name
checked
events onClick

17
 input – hidden
name hidden
value name
submit

18
 table
border
width
height

19
 tr, td, th
align
valign
bgcolor
width
height

20
Demo – table.htm

<html>
<head></head>
<body>
<table border="1"> 
<tr> 
<th>No.</th> 
<th>col1</th>
<th>col2</th>
</tr> 
<tr>
<td>row1</td> 
<td>table detail row 1 column 1</td>
</tr>
<tr>
<td>row2</td>
</tr>
</table> 
</body>
</html>

21
Demo – frminput.htm

<html>
<head><title>Input form</title></head>
<body>
<form name="frmInput" method="post" action="getInfo.php">
Student Name :<input type=text name=txtName><br>
Student ID :<input type=text name=txtID><br>
Sex : <select name=selSex>
<option value=M> </option>
<option value=W> </option>
</select>
Score :<input type=text name=txtScore><br>
<input type=submit value=Submit><br>
</form>
</body>
</html>

22
Demo – getinfo.php
<? #getinfo.php
echo "<center><h3>";
print " <br>";
print " $txtName<br>";
print " $txtID<br>";
switch($selSex){
case "M" : $selSex=" "; break;
default : $selSex=" "; break;
}
print " $selSex<br>";
if($txtScore < 50){
$getGrade = "D";
}elseif($txtScore < 65){
$getGrade = "C";
}elseif($txtScore < 80){
$getGrade = "B";
}else{
$getGrade = "A";}
print " $getGrade<br>";
echo "</h3></center>";
?>

23
Demo – frmInput02.htm
<html>
<head></head>
<body>
<form name="frmInput" method="post" action="getInfo02.php">
<table>
<tr>
<td align="right">Student Name:</td>
<td><input type=text name=txtName></td>
</tr>
<tr>
<td align="right">Student ID:</td>
<td><input type=text name=txtID></td>
</tr>

24
Demo – frmInput02.htm (
<tr>
<td align="right">Sex:</td>
<td>
<select name=selSex>
<option value=M> </option>
<option value=F> </option>
</select>
</td>
</tr>
<tr>
<td align="right">Score:</td>
<td><input type=text name=txtScore></td>
</tr>
<tr>
<td colspan="2" align="center"><input type=submit value=Submit></td>
</tr>
</table>
</form>
</body>
</html>

25
Demo – getInfo2.php
<? #getinfo02.php
echo "<center><h3>";
print "
<br>";
print " $txtName<br>";
print " $txtID<br>";
switch($selSex){
case "M“ :$selSex=“ "; break;
default :$selSex=“ ";break;
}

26
Demo – getInfo2.php (
print " $selSex<br>";
if($txtScore < 50)
$getGrade = "D";
elseif($txtScore < 65)
$getGrade = "C";
elseif($txtScore < 80)
$getGrade = "B";
else
$getGrade = "A";
print " $getGrade<br>";
echo "<h3></center>";
?>

27
PHP
substr()


 substr(string string, int start[, int length]);
 string
 start
0
 length

28
PHP
Demo – substr.php
<? //substr.php
$text = "integer is number";
print(substr($text, 0, 7));
?>

29
PHP
substr_replace()


 substr_replace(string string, string replacement,
int start[, int length]);
string
replacement
start
0

30
PHP
Demo – substrrp.php
<?php #substrrp.php
$text = "integer is number";
$newtext = substr($text, 0, 10);
print($newtext."<br>");
$newtext = substr_replace($newtext, " not float", 11);
$newtext = substr_replace($text, " not float", 11);
$newtext = substr_replace($text, " not float", 11,0);
?>

31
PHP
 str_replace()


 mixed str_replace(mixed search, mixed replace,
mixed subject[, int &count]);
search
replace
subject
count
(pass by reference)
&

32
PHP
str_replace()
Demo – strrp.php
<?php #strrp.php
$oldstr = "integer is number";
$newstr = str_replace("integer", "float",
$oldstr);
print($newstr."<br>");
?>

33
PHP
 strpos()


 int strpos(string haystack, string needle [, int
offset]);
haystack
needle
offset
optional parameter

34
PHP
strpos()
Demo – strpos.php
<?php #strpos.php
$email = "chatchag@hotmail.com";
$name = substr($email, 0, strpos($email, "@"));
print("Name : ".$name."<br>");
$domain = substr($email, strpos($email, "@")+1, 11);
print("Domain : ".$domain."<br>");
?>

35
PHP
DEMO - frminputstrpos2.htm

<html>
<head><title>Input form</title></head>
<body></body>
<form name="frmInput" method="post" action="strpos2.php">
E-mail :<input type=text name=txtEMail><br>
Year :<input type=text name=txtID><br>
<input type=submit value=Submit><br>
</form>
</html>

36
PHP
strpos()
Demo – strpos2.php
<?php #strpos2.php
print "<h1>";
print “ 25".substr($txtID, 2, 2)."<br>";
print “ e-Mail : ";
print substr($txtEMail, 0, strpos($txtEMail, "@"));
print "<br>";
print "Domain : ".substr($txtEMail, strpos($txtEMail, "@")+1);
print "<br>";
print "</h1>";
?>

37
PHP
 strrpos()

strpos()

 int strrpos(string haystack, string needle [, int offset]);
haystack
needle
offset
optional parameter

38
PHP
strrpos()
Demo – strrpos.php
<?php #strrpos.php
$email = "chatchag@tot.co.th";
print strpos($email, "a")."<br>";
print strrpos($email, "a")."<br>";
?>

39
PHP
 strlen()
int strlen(string, string);
DEMO strlen()
<?php #strlen.php
print("email length ".strlen($email)."<br>");
$name = substr($email, 0, strpos($email, "@"));
print("name length ".strlen($name)."<br>");
$domain = substr($email, strpos($email, "@")+1);
print("domain length ".strlen($domain)."<br>");
?>

40
PHP
 ltrim(), rtrim(), trim(), chop()

 trim()
 ltrim()
 rtrim()
 chop()

trim(string string)

41
PHP
 ltrim(), rtrim(), trim(), chop()
Demo
<?php #trim.php
$email = " chatchag@tot.co.th ";
print "all ".".".$email.".<br>";
print "trim ".".".trim($email).".<br>";
print "ltrim ".".".ltrim($email).".<br>";
print "rtrim ".".".rtrim($email).".<br>";
print "chop ".".".chop($email).".<br>";
?>

42
PHP
 list()


 list($var1[, $var2, [$var3, …]])
$vari i

43
PHP
 explode()


 array explode(string separator, string [, int limit])

 separator
 string
 limit

44
PHP
 explode()
Demo
<?php #explode.php
$email = " chatchag@tot.co.th ";
list($name, $domain) = explode("@", $email);
print $name."<br>";
print $domain."<br>";
?>

45
PHP
 explode()
Demo
<?php #explode2.php
$email = " system@chatchag@tot.co.th ";
list($sys, $name, $domain) = explode("@",$email, 3);
print $sys."<br>";
print $name."<br>";
?>

46
PHP
 implode()
 element
array


 string implode(string glue, array pieces)

 glue
 pieces array

47
PHP
 implode()
Demo
<?php #implode.php
list($name[], $domain) = explode("@", $email);
print $name[0]."<br>";
$name[] = "yahoo.com";
$newemail = implode("@", $name);
print $newemail."<br>";
?>

48
PHP
 implode()
Demo
<?php #implode2.php
<?php
$array = array('lastname', 'email', 'phone');
$comma_separated = implode("@", $array);
echo $comma_separated;
?>

49
PHP
 strtolower(), strtoupper()

 strtolower()
 strtoupper()
Demo
<?php #strtou.php
$email = "chatchag@tot.co.th"."<br>";
print strtoupper($email);
$email = "CHATCHAG@TOT.CO.HT";
print strtolower($email);
?>

50
PHP
 ucfirst(), ucwords()

 ucfirst()
 ucwords()
Demo
<?php #ucwords.php
$email = "chatchag@ tot.co.th hotmail.com"."<br>";
print ucwords($email);
$email = "chatchag@ tot.co.th hotmail.com";
print ucfirst($email);
?>

51
PHP
 strcmp()
 string 2

 int strcmp(string str1, string str2)
 str1, str2
Demo
<?php #strcmp php
$email1 chatchag@tot co th ;
$email2 chatchag@yahoo com ;
print strcmp $email1, $email1 <br> ;
?>

52
PHP
 printf(), sprintf()
void printf(string format [,mixed args])
string sprintf(string format [,mixed args])
type specifier
%

53
PHP
 printf(), sprintf()
(type specifier)
b argument
c argument Ascii
code
d argument
u argument
f argument
o argument
s argument string
x argument

54
PHP
Demo
<? //sprintf.php
$format = "chocolate 2 %s, is 129 %s. ";
$output = sprintf($format, "scoop(s)", "Baht");
print $output."<br>";
?>
<? //printf.php
$model = "AF-111";$unitprice = "25230.255";
$format = “ %s = %.2f ";
printf($format, $model, $unitprice)."<br>";
?>

55
PHP
 is_int(), is_integer()
 integer
Demo
<? //isint.php
$i = 1.30;
#settype($i, "integer");
if(is_int($i))
print $i." is an integer.<br>";
else
print $i." is not an integer.<br>";
?>

56
PHP
 is_float(), is_double()

Demo
<? //isfloat.php
$i = 1.30;
#settype($i, "integer");
if(is_float($i))
print $i." is an float.<br>";
else
print $i." is not an float.<br>";
?>

57
PHP
 decbin(), bindec()
decbin()
bindec()
Demo
<? //decbin.php
$d = 10;
print $d." is ".decbin($d).".<br>";
$b = 1001;
print $b." is ".bindec($b).".<br>";
?>

58
PHP
 decoct(), octdec()
decoct()
octdec()
Demo
<? //decoct.php
$d = 10;
print $d." is ".decoct($d).".<br>";
$o = 20;
print $o." is ".octdec($o).".<br>";
?>

59
PHP
 dechex(), hexdec()
dechex()
hexdec()
Demo
<? //dechex.php
$d = 10;
print $d." is ".dechex($d).".<br>";
$h = a;
print $h." is ".hexdec($h).".<br>";
?>

60
PHP
 floor(), ceil(), round()
floor()
ceil()
round()
float round(float val [, int precision])
val
0 default 0

61
PHP
 floor(), ceil(), round()
Demo
<?php #round.php
$num1 = 123.2563;
$num2 = 235.2566;
$avg = ($num1 + $num2)/2;
print $avg."<br>";
print round($avg,2)."<br>";
print round($avg,-1)."<br>";
print floor($avg)."<br>";
print ceil($avg)."<br>";
?>

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