PHP特區 : [教學]PHP入門必讀

<?php 
echo "Hello, World!"; 
?> 

<?php 
$message = "Hello, World!"; 
echo $message; 
?> 

<?php 
$greeting = "Hello "; 
$num = 3 + 2; 
$num++; 
echo "$greeting $num people!"; 
?>

<?php 
$name = ´Susannah´; 
$greeting_1 = "Hello, $name!"; 
$greeting_2 = ´Hello, $name!´; 
echo "$greeting_1\n"; 
echo "$greeting_2\n"; 
?> 

<?php 
echo "[$REQUEST_URI]"; 
?> 

$fruit[0] = ´banana´; 
$fruit[1] = ´papaya´; 
$favorites[´animal´] = ´turtle´; 
$favorites[´monster´] = ´cookie´;

$fruit[] = ´banana´; 
$fruit[] = ´papaya´;

$people[´David´][´shirt´] = ´blue´; 
$people[´David´][´car´] = ´minivan´; 
$people[´Adam´][´shirt´] = ´white´; 
$people[´Adam´][´car´] = ´sedan´;

array()

$fruit = array(´banana´,´papaya´); 
$favorites = array(´animal´ => ´turtle´, 
´monster´ => ´cookie);

$people = array (´David´ => array(´shirt´ => ´blue´, 
´car´ => ´minivan´), 
´Adam´ => array(´shirt´ => ´white´, 
´car´ => ´sedan´));

$fruit = array(´banana´,´papaya´); 
print count($fruit);

for ($i = 4; $i < 8; $i++) { 
print "I have eaten $i bagels today.\n"; }

$i = 4; while ($i < 8) { 
print "I have eaten $i bagels today.\n"; 
$i++; 
} 

if ($user_count > 200) { 
print "The site is busy right now!"; 
} elseif ($user_count > 100) { 
print "The site is sort of active right now!"; 
else { 
print "The site is lonely - only $user_count user logged on."; 
} 

<?php 

<INPUT TYPE=TEXT NAME="name" VALUE="Glen Morris"> 

echo "Hi $name!";

if ($name == "Glen Morris") { echo "Please check your email."; }

<?php 
function display_form() { 
global $PHP_SELF; 
?> 
<FORM TARGET="<?php echo $PHP_SELF; ?>" METHOD=GET> 
Name: <INPUT TYPE=TEXT NAME="name"><BR> 

Favorite Cheese: <INPUT TYPE=RADIO NAME="cheese" VALUE="brie">Very soft French Brie 
<INPUT TYPE=RADIO NAME="cheese" VALUE="cheddar">Farmhouse English Cheddar 
<INPUT TYPE=RADIO NAME="cheese" VALUE="mozzarella">Italian Buffalo Mozzarella 


Favorite Times to Eat Cheese: 
<INPUT TYPE=CHECKBOX NAME="times[]" VALUE="m">Morning 
<INPUT TYPE=CHECKBOX NAME="times[]" VALUE="n">Noon 
<INPUT TYPE=CHECKBOX NAME="times[]" VALUE="d">Dinner 
<INPUT TYPE=CHECKBOX NAME="times[]" VALUE="l">Late night 


<INPUT TYPE=HIDDEN NAME="stage" VALUE="results"> 
<INPUT TYPE=SUBMIT VALUE="Thanks!"> 
</FORM> 
<?php 
} 
?>

global $PHP_SELF;

<?php 
function process_form() { 
global $name; 
global $cheese; 
global $times; 

if ($cheese == ´brie´) { $cheese_message = ´I love brie.´; } 
elseif ($cheese == ´cheddar´) { $cheese_message = ´Cheddar is awesome!´; } 
else { $cheese_message = ´Fresh mozzarella is divine.´; } 

$favorite_times = count($times); 

if ($favorite_times <= 1) { 
$times_message = ´You should eat cheese more often.´; 
} elseif ($favorite_times > 1 && $favorite_times < 4) { 
$times_message = ´Those are good times to eat cheese.´; 
} else { 
$times_message = ´You are eating too much cheese.´; 
} 

echo "Hello $name."; 
echo "$cheese_message $times_message"; 
} 

?>

<?php 
if (empty($stage)) { display_form(); } 
else { process_form(); } 
?>

<?php 
function display_name() { 
global $PHP_SELF; 

?> 
<FORM TARGET="<?php echo $PHP_SELF; ?>" METHOD=GET> 
Name: <INPUT TYPE=TEXT NAME="name"><BR> 
<INPUT TYPE=HIDDEN NAME="stage" VALUE="cheese"> 
<INPUT TYPE=SUBMIT VALUE="Thanks!"> 
</FORM> 
<?php 
} 
?> 

<?php 
function display_cheese() { 
global $PHP_SELF; 
global $name; 

?> 
<FORM TARGET="<?php echo $PHP_SELF; ?>" METHOD=GET> 
Favorite Cheese: <INPUT TYPE=RADIO NAME="cheese" VALUE="brie">Very soft French Brie 
<INPUT TYPE=RADIO NAME="cheese" VALUE="cheddar">Farmhouse English Cheddar 
<INPUT TYPE=RADIO NAME="cheese" VALUE="mozzarella">Italian Buffalo Mozzarella 

Favorite Times to Eat Cheese: <INPUT TYPE=CHECKBOX NAME="times[]" VALUE="m">Morning 
<INPUT TYPE=CHECKBOX NAME="times[]" VALUE="n">Noon 
<INPUT TYPE=CHECKBOX NAME="times[]" VALUE="d">Dinner 
<INPUT TYPE=CHECKBOX NAME="times[]" VALUE="l">Late night 

<INPUT TYPE=HIDDEN NAME="name" VALUE="<?php echo htmlspecialchars($name); ?>"> 
<INPUT TYPE=HIDDEN NAME="stage" VALUE="results"> 
<INPUT TYPE=SUBMIT VALUE="Thanks!"> 
</FORM> 
<?php 
} 
?>

<?php 
if (empty($stage)) { display_name(); } 
elseif ($stage == ´cheese´) { display_cheese(); } 
else { process_form(); } 
?>

setcookie(´name´, ´bret´;);

<?php 
$y2k = mktime(0,0,0,1,1,2000); 
setcookie(´name´, ´bret´, $y2k); 
?> 

<?php 
$y2k = mktime(0,0,0,1,1,2000); 
setcookie(´name´, ´jeff´, $y2k); 
?> 

<?php 
$name = ´jeff´; 
$y2k = mktime(0,0,0,1,1,2000); 
setcookie(´name´, $name, $y2k); 
?> 

<?php 
setcookie(´name´, ´jeff´, $y2k, ´~/myhome´, ´.domain.com´); 
?>

<?php setcookie(´name´); ?>

<?php 
setcookie(´name´, ´jeff´); 
echo "Hello Everyone!"; 
?> 

<?php 
echo "Hello Everyone!"; 
setcookie(´name´, ´jeff´); 
?> 

<?php 
$birthday_stamp = mktime(19,45,0,3,10,1975); 
$birthday_formatted = date(´F d, Y - g:i a´,$birthday_stamp); 

echo "David was born on $birthday_formatted." 
?> 

<SELECT NAME="when"> 
<?php 
$d = time(); 
for ($i = 0; $i < 10; $i++) { 
echo ´<OPTION VALUE="´.$d.´">´.date(´F d´,$d); 
$d += 86400; 
} 
?> 
</SELECT>

<?php 

function display_form() { 
global $PHP_SELF; 

$dotw = array(´Sunday´,´Monday´,´Tuesday´,´Wednesday´,´Thursday´, 
´Friday´,´Saturday´); 
$months = array( 1 => ´January´,´February´,´March´,´April´,´May´,´June´, 
´July´,´August´,´September´,´October´,´November´,´December´); 
?> 
<FORM TARGET="<?php echo $PHP_SELF; ?>" METHOD=GET> 
Find the first 
<SELECT NAME="dotw"> 
<?php 
for ($i = 0; $i < 7; $i++) { 
echo "<OPTION> $dotw[$i]"; 
} 
echo ´</SELECT> after <SELECT NAME="month">´; 
for ($i = 1; $i <= 12; $i++) { 
echo "<OPTION VALUE=\"$i\"> $months[$i]"; 
} 
echo ´</SELECT> <SELECT NAME="day">´; 
for ($i = 1; $i <= 31; $i++) { 
echo "<OPTION> $i"; 
} 
echo ´</SELECT>, <SELECT NAME="year">´; 
$start_year = date(´Y´) - 10; 
$end_year = $start_year + 20; 
for ($i = $start_year; $i <= $end_year; $i++) { 
echo "<OPTION> $i"; 
} 
echo ´<INPUT TYPE="HIDDEN" NAME="stage" VALUE="process">´; 
echo ´</SELECT> <INPUT TYPE="SUBMIT" VALUE="Do it!"7></FORM>´; 
} 

?>

<?php 
function process_form() { 
global $dotw; 
global $month; 
global $day; 
global $year; 
$timestamp = mktime(0,0,0,$month,$day,$year); 

$next_dotw = ´´; 
$next_timestamp = $timestamp; 

while ($next_dotw != $dotw) { 
$next_timestamp += 86400; 
$next_dotw = date(´l´,$next_timestamp); 
} 

$formatted_first = date(´F d, Y´,$timestamp); 
$formatted_next = date(´F d, Y´,$next_timestamp); 
echo "The first $dotw after $formatted_first is $formatted_next."; 
} 
?>

<?php 
if (empty($stage)) { display_form(); } 
else { process_form(); } 

?>

<?php 
$today = mktime(12,0,0,6,25,1999); 
echo ´Here it is ´.date(´g:i:s a, F d, Y´,$today); 
echo ´´; 
echo ´In GMT it is ´.gmdate(´g:i:s a, F d, Y´,$today); 

?>