PHP/MySQL

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HTML

HTML PHP (PHP code mode) :

1 2 3

echo (" editors, FrontPage, "); 4

(short) tags. short_tags(), short_open_tag configuration setting config PHP PHP --enable-short-tags option.

tags ASP asp_tags configuration setting. ASP-style tags 3.0.4. C Perl - (;) tag (?>) -, :

PHP C , Shell

PHP Comments

PHP/MySQL

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1 : // ( ) 2 : /* */ ( block ) 3 : # comments , /

. (Variables) .

$.

=

letter _(underscore). +,-,&,* : $today=Monday; //(, string) $total=1000; //(number)

case-sensitive .. $total $Total .

: $total=10; $total=100;

, . php . . Variable Example

PHP/MySQL

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PHP (runtime) PHP. , (cast) settype() . , . PHP Integer 8 Double 4.254 String Goodmorning Boolean true (true false) gettype() PHP . , gettype() , . gettype() .

PHP/MySQL

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PHP settype() . settype(), , , . 3.14 ( double) . , , . settype() (cast) , .

PHP/MySQL

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$holder=(string) $undecided; echo gettype($holder); echo " is $holder"; //integer $holder=(integer) $undecided; echo gettype($holder); echo " is $holder"; //double $holder=(double) $undecided; echo gettype($holder); echo " is $holder"; //boolean $holder=(boolean) $undecided; echo gettype($holder); echo " is $holder"; echo "original variable type: "; echo gettype($undecided); ?> =. : $name=George . + 7+3 10 - 7-3 4 * 7*3 21 / 7/3 2.333333333 % 7%3 1 (concatenation) . , . , "hello"." world" "hello world" .

PHP/MySQL

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, PHP , . , . : $x=6; $x=$x+3; // x 9 : $x=6; $x+=3; // x 9 += $x+=3 $x=$x+3 -= $x-=3 $x=$x-3 *= $x*=3 $x=$x*3 /= $x/=3 $x=$x/3 %= $x%=3 $x=$x%3 .= $x.=test $x=$x.test 1. ; $this_is_a_value $___test___ $metritis $the counter $my-name $count $2test 2. ; $test_val=6.5466; settype($test_val, integer); echo $test_val; 3. ; echo gettype(8);

PHP/MySQL

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scripts . script , . . scripts .

if if , PHP. . if (expr) statement , expr Boolean . expr TRUE, PHP , FALSE - . a b $a $b: . , if . , statement group. , a is bigger than b $a $b, $a $b: If if , .

else

, . ' else. else if if FALSE. , a is bigger than b $a $b, a is NOT bigger than b :

PHP/MySQL

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elseif elseif, , if else. ' else, if if FALSE. , else, elseif TRUE. , a is bigger than b, a equal to b or a is smaller than b:

elseif if. elseif ( ) TRUE . PHP, 'else if' ( ) 'elseif' ( ). .

elseif if elseif FALSE, elseif TRUE.

== != -

=== > >= <

PHP/MySQL

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|| Or () true or Or () true xor Xor ( true, ) && And () true and And () true ! Not () true 1. . = 2 = 4. . 2. script . . 3. script . 4. script a, b, c. max, . 5. 1. 0.7, 2. 0.5, 3. 0.4, 4. 0.8. . script 3.

6. , :

PHP/MySQL

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800 3,5 . :

. . . . "" "" .

. .

. . . 0 2000 "" "".

switch switch . switch (expression) { case value1: statements; break; case value2: statements; break; default: statements; , case. break switch. , case. default, . ! break, case default. , . while while PHP. while () { } while true, . loop, , ( PHP loop ). , while

PHP/MySQL

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FALSE , - . while while (): endwhile; dowhile dowhile while . while loops do..while loop ( ). do { while (); 1. script PHP lang fr, es, en, de, gr. (, , , , ). ! 2. while sript 7.

3. :

PHP/MySQL

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1. 1 2 3 4 5 6 7 8 9 10 2. 2 4 6 8 10 12 14 16 18 20 3. 3 6 9 12 15 18 21 24 27 30 4. 4 8 12 16 20 24 28 32 36 40 5. 5 10 15 20 25 30 35 40 45 50 6. 6 12 18 24 30 36 42 48 54 60 7. 7 14 21 28 35 42 49 56 63 70 8. 8 16 24 32 40 48 56 64 72 80 9. 9 18 27 36 45 54 63 72 81 90 10. 10 20 30 40 50 60 70 80 90 100 printf %4d ( 4 ) %d.

4. script .

5. . : Alpha Bravo Charlie Delta Echo Foxtrot Golf Hotel India Juliet Kilo Lima Mike November Oscar Papa Quebec Romeo Sierra Tango Uniform Victor Whiskey Xray Yankee Zulu. 1-9 (*) . .

: :

Hello 2 you!.

:

Hotel Echo Lima Lima Oscar ** Yankee Oscar Uniform!

PHP/MySQL

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for

for loops loops PHP. for loop :

for (expr1; expr2; expr3) statement

(expr1) loop.

, expr2 . TRUE, loop . FALSE, loop .

, expr3.

for (expr1; expr2; expr3) statement 1. script 2000 1-10 : 2000 . . 2. for.

PHP/MySQL

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scripts - . HTML server. HTML PHP. HTML. Form.php Name: Address: Test.php Self.php

PHP/MySQL

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$user=$_POST[USER]; $address=$_POST[ADDRESS]; if ($user){ echo "Welcome $user"; echo "Your address is:$address"; } ?>

PHP/MySQL

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(Arrays) . . $name (, , ). . , . , (key) (value). , 0. , , . array(), , [ ].

array() .

[ ] ( ), .

$cars = array("Toyota", "Mercedes", "BMW", "Ferrari", "Renault"); $cars[] = "Toyota"; $cars[] = "Mercedes"; $cars[] = "BMW"; $cars[] = "Ferrari"; $cars[] = "Renault"; $cars[0] = "Toyota"; $cars[1] = "Mercedes"; $cars[2] = "BMW"; $cars[3] = "Ferrari"; $cars[4] = "Renault"; 1. ('Perl', 'PHP', 'C','Java', 'Pascal', 'Cobol', 'Visual Basic') . 2. (8, 12, 21, 3, 15, 6, 7, 32, 9) . 3. 2. 4. 2 . 5. 8 . , .

PHP/MySQL

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6. , N! , . 7. php script N! (1*2*3*4*5.*). . 8. ! browser HTML.

PHP/MySQL

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date()

string date ( string format [, int timestamp] )

string format string, integer timestamp timestamp.

timestamp Fri, 13 Dec 1901 20:45:54 GMT Tue, 19 Jan 2038 03:14:07 GMT. ( , , integer 32-bit). windows 01-01-1970 19-01-2038.

timestamp string, strtotime(). , timestamps ( UNIX_TIMESTAMP MySQL).

format string:

a - "am" "pm" A - "AM" "PM" B - Swatch Internet time d - , 2 ("01" "31"). D - , 3 . .. "Fri" F - , . .. "January" g - , 12 ("1" "12"). G - , 24 ("0" "23"). h - , 12 ("01" "12"). H - , 24 ("00" "23"). i - ("00" "59"). I ( i) - "1" , "0". j - ("1" "31"). l ( 'L') - , . .. "Friday" L - boolean ("0" "1"). m - ("01" "12"). M - , 3 . .. "Jan" n - ("1" "12"). O - Greenwich time . .. "+0200" r - RFC 822; .g. "Thu, 21 Dec 2000 16:01:07 +0200"

( PHP 4.0.4) s - ("00" "59") S - , 2 ("st", "nd",

"rd" "th"). t - ("28" "31"). T - ; .. "EST" "MDT" U - Unix Epoch (January 1 1970 00:00:00 GMT) w - , ("0" () to "6" ()). W - ISO-8601,

( PHP 4.1.0) Y - , 4 ; .. "1999"