Chungbuk HRDI of KCCI PhD Kang,Won-Chan PHP Programming (Language basic)

Chungbuk HRDI of KCCIPhD Kang,Won-Chan

PHP Programming(Language basic)

PHP ProgrammingPHP Programming

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example<html><head><title> Hello PHP!</title></head><body><?php

$var_a=3500;echo("var_a : $var_a ");$var_b="hello";echo("var_b : $var_b ");$var_b = "200";$var_result = $var_a+ $var_b;echo("var_b : $var_b ");echo("sum : $var_result");

?></body></html>

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Variable type<html><head><title> Hello PHP!</title></head><body><?php

$var_a=350.0;$type = gettype($var-a);echo("real var_a's value is $var_a, variable is {$type} ");$var_a=(int)$var_a;$type=gettype($var_a);echo("integer var_a's valu is $var_a, variable is {$type} ");settype($var_a,"double");$type = gettype($var_a);echo("integer var_a's variable is {$type} ");

?></body></html>

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array<html><head><title> Hello PHP!</title></head><body><?php

$name[]="kang";$name[]="kim";$name["ceo"]="choi";$name[]="lee";echo("$name[0] - $name[1] -$name[ceo] -$name[2]");

?></body></html>

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array<html><head><title> Hello PHP!</title></head><body><?php

$member[0][0]="kang";$member[0][1]="kim";$member[1][0]="choi";$member[1][1]="lee";

echo("$member[0][1] ");echo("{$member[1][0]} ");echo $member[1][1] . " ";

?></body></html>

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array<?php

$member["ceo"]["age"]=48;$member["ceo"]["sex"]="F";$member["ceo"]["name"]="Kang, won-chan";

$member["cto"]["age"]=35;$member["cto"]["sex"]="M";$member["cto"]["name"]="Go, Min-Jung";

$member["cio"]["age"]=23;$member["cio"]["sex"]="M";$member["cio"]["name"]="Kim, Ji-Suk";

echo $member[cto][name];

?>

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array<?

$member=array("ceo"=>array("age"=>48,"sex"=>"F","name"=>"Kang, Won-Chan"),"cto"=>array("age"=>35,"sex"=>"M","name"=>"Ko, Min-Jung"),"cio"=>array("age"=>23,"sex"=>"M","name"=>"Kim, Ji-Suk"));

echo $member[cto][name];?>

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Function call<?

class Car { function testCar() {

echo("call to testCar function!");

}}

$sedan = new Car;$sedan->testCar();

?>

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Global variableFalse case

<?$a=100;Function Test(){ echo("variable \$a's value is {$a}"); } Test();

?>

True case<?

$a=100;Function Test(){

GLOBAL $a; echo("variable \$a's value is {$a}"); } Test();

?>

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Global variablecase1

<?$a=100;$b=200;function Sum(){ global $a, $b; $b=$a+$b; } Sum(); echo "Variable b's value is ".$b."!";

?>

case2<?

$a=100;$b=200;function Sum(){ $GLOBALS["b"]=$GLOBALS["a"] +$GLOBALS["b"]; } Sum(); echo "Variable b's value is ".$b."!";

?>

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Static variable<?

function countIt() { static $i =10; echo "Variable value is " .$i. "!! "; $i=$i+2; } countIt(); countIt(); countIt();

?>

<?function countIt() { static $i =10; echo "Variable value is " .$i. "!! "; $i=$i+2; } countIt(); countIt(); countIt(); echo "Variable value is " .$i. "!! ";

?>

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<?$author ="Jay";${$author}="Kang, Won-Chan";

echo "author :".$author. " ";echo "Jay :".${author}. " ";echo "Jay :".${$author}. " ";echo "Jay :" .$Jay." ";

?>

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POST methodTest.php<html><body><form method="POST" action ="formcgi.php">Input Name: <input type="text" name="username"> Input Sex : <input type="text" name="sex"><input type="submit" value="transmit"></form></body></html>

Formcgi.php<?

echo("Your name is $username ");echo("Your sex is $sex !!");

?>

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//test2.php<html><body><form method="POST" action ="formcgi2.php?table=BBS&code=jcafe">Input Name: <input type="text" name="username"> Input Sex : <input type="text" name="sex"><input type="submit" value="transmit"></form></body></html>

//formcgi2.php<? echo("Your name is $username

 ");echo("Your sex is $sex !!");echo("POST Method.... ");while(list($key,$value)=each($HTTP_POST_VARS)){ echo("variable name: $key, value:$value ");}echo("GET Method.... ");while(list($key,$value)=each($HTTP_GET_VARS)){ echo("variable name: $key, value:$value ");}

?>

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expressions<?

$a=12;$b=5.2;$res=$a+$b;echo("res by addition :$res ");$res=$a-$b;echo("res by subtraction : $res ");$res=$a*$b;echo("res by multiplication : $res ");$res=$a/$b;echo("res by division : $res ");$res=$a%$b;echo("res by modulus : $res ");if($a<$b){ echo("\$b is greater than \$a"); }else{ echo("\$a is greater than \$b"); }

?>

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<.> operator<?

$res="hello?"."nice to meet you";echo "result is=>".$res;

?>

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Logical Operator<? $a=5;

$b="";if($a && $b) {

echo "true";} else { echo "false“; }echo(" ");if($a or $b){echo "true";} else { echo "false“; }echo(" ");if($a xor $b){echo "true";} else { echo "false“; }echo(" ");if(!$b){echo "true";} else { echo "false“; }

?>

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If~else<?

$a=12;$b=20;if($a>$b){ echo ("a is great then b ");} else if ($a<$b) { echo ("b is great then a ");} else { echo "(a=b )";}

?>

<?$a=12;$b=20;if($a>$b) echo ("a is great then b "); else if ($a<$b) echo ("b is great then a "); else echo "(a=b )";

?>

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while<?

$i=0;while($i<10) { echo(" variable \$i's value ={$i}, less then 10. "); $i++;}

?>

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Do~while<?

$i=1;do { echo(" variable \$i's value ={$i} "); $i--;}while($i>0)

?>

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for<?

for($i=0; $i<10;$i++){ echo("variable \$i's value is {$i} ");}

?>===============================<?

for($i=0; ;$i++){ if($i<10){ echo("variable \$i's value is {$i} "); } else { break; }}

?>

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Each, list<?

$data = array("Lee one"=>"A", "Kang Two"=>"C", "Kim Three"=>"D");while(list($name,$class)=each($data)) { echo $name." student is ".$class." class student. "; }

?>==================================================

==<?

$data = array(100,200,400,3000);while(list($name,$class)=each($data)) { echo $name." student is ".$class." class student. "; }

?>

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break<?

$arr=array("Kan Won", "Kim Two", "Song Three");$i=0;while($i<sizeof($arr)){ if($arr[$i] == "Kim Two") { $count =$i+1; echo("{$count}th array element! "); break; } $i++;}echo("array reference number is $i.");

?>

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continue<?

$arr=array("Kan Won", "Kim Two", "Song Three");

while(list($key,$value)=each($arr)){ if($key %2) { continue; } echo("Index : $key ");}

?>

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switch<?

$var=2;

switch($var) { case (1): echo("variable value is 1"); break; case (2): echo("variable value is 2"); break; case (3): echo("variable value is 3"); break; default: echo("I don't know variable value"); break; }

?>

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includeSave as…. Message.txt

hello, Kang Won-Chan.====================================Save as….Test.php

<html><body><center><h2> Transmit Message!!.</h2></center><?php

include "message.txt“;?></body></html>

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<?php

$arr=array("name1.txt","name2.txt","name3.txt");for($i=0;$i<sizeof($arr);$i++) { $filename="name".($i+1).".txt"; include $filename; echo " ";}

?>=================================Save as filname name1.txt Kang, Won-ChanSave as filname name2.txt Kim, Seong-ChulSave as filname name3.txt Kim, Gui-Tai

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<?phpinclude "http://www.yahoo.co.kr";

?>

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require<?php

$i=1;if($i%2){ require "case1.php"; } else { require "case2.php"; }

?>========================================

==Save as case1.php <? echo "CASE 1”; ?>Save as case2.php<?

echo "CASE 2;?>

Miss “

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<?php$i=1;if($i%2){ include "case1.php"; } else { include "case2.php"; }

?>==========================================

Save as case1.php <? echo "CASE 1”; ?>Save as case2.php<?

echo "CASE 2;?>

Miss “

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foreach<?php

$arr=array("Kan Won", "Kim Two", "Song Three");

foreach($arr as $value) { echo $value." ";}

?>

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<?php$arr= array("Lee one"=>"A", "Kang Two"=>"C", "Kim Three"=>"D");

foreach($arr as $key=>$value) { echo $key."-".$value." ";}

?>===============================<?php

$arr= array("Lee one"=>"A", "Kang Two"=>"C", "Kim Three"=>"D");

while(list($key,$value)=each($arr)){ echo $key."-".$value." ";}

?>

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function<?php

$res=summation(1,10);echo("result 1: $res ");

$res=summation(1);echo("result 2: $res ");

function summation($num1, $num2=5) { $sum=$num1+$num2; return $sum;}

?>

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Return by value<?php

function foo($a){ $b=$a*3; return $b; } $res=foo(4); echo("res: $res ");

?>===================================<?php

function foo(){ return array("kang","kim","song");}list($name1, $name2,$name3)=foo();echo("$name1 /$name2/$name3");

?>

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Return by reference<?php

function foo(&$str){ $str.="world...“; }function swap(&$a,&$b) { $temp=$b; $b=$a; $a=$temp; }$a=10;$b=15;echo("\$a:$a - \$b:$b : ");swap($a,$b);echo("\$a:$a - \$b:$b ");$str="Hello!";echo("$str ");foo($str);echo("$str ");

?>

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Function argument<?php

function summation(){ $num=func_num_args(); echo " argument". $num." "; if($num>=2){ echo "first argument is".func_get_arg(0)." and "; echo " second argument is".func_get_arg(1)."..."; }}summation(12,15,9);

?>


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Chungbuk HRDI of KCCI PhD Kang,Won-Chan PHP Programming (Language basic)

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