Several classic codes that must be collected when learning PHP Page 1/2_PHP Tutorial

Classic loop example






for($counter = 1; $counter <= 6; $counter++) //Loop 6 times
{
print("counter is $counter< /B>
n"); //Print 6 times
} }
?>




Advanced use of for





/*
** Print necessary description
*/
print("How many days until Monday?n ");
print("

n");
for($currentDate = date("U"); //Define $currentDate time format
date("l", $currentDate ) != "Monday"; //Judge whether the current system time is Monday
$currentDate += (60 * 60 * 24)) //Current time plus 1 day
{
/*
      ** Print time name                                                                                              ("

n");
?>



Simple call of function:






function printBold($inputText) //Define function printBold()
{
print("" . $inputText . "") ; ////Print $inputText
}
print("This line is not emphasized!
n"); //Print the string directly
printBold("This line is getting heavier!!!"); //Call the function printBold() function
print("
n" );
print("This line is not emphasized!
n"); 🎜>
Function with return value



< ;/HEAD>


function makeBold($inputText) //Define function makeBold() function
{
$boldedText = "";
$boldedText .= $inputText;
$boldedText .= "";
return($boldedText); //Return variable $ boldedText
}
print("This line is not emphasized!!!
n"); //Print the string directly
print(makeBold("This line is emphasized!!!") . "
n");//Call function makeBold() function
print("This line is not aggravated!!!
n"); //Print the string directly
?>




Functions with default parameters





function printColored($Text, $Color="black") //Define function function
{
print("< FONT COLOR="$Color">$Text"); //Get the content and color of the string
}
printColored("This is a black word!"); //Call function function
print("

n");
printColored("This is a blue word!", "blue"); //Call function
print("
n");
?>




The algorithm used to determine whether it is an integer

;


function checkInteger($Number)
{
                                                                                                                                                                                                                                                            {
                                           * For a negative number, */
              /* You can analyze its absolute value*/                                                                                                            
                                                                                                                                          return("Of course not");
                                                                                                                   Mathematical definition */
     return("Yes"); >                                                                                                                                                                                                       "Is 7 an integer? " .
checkInteger(7) . "
n");
print("3.5?" . checkInteger(3.5) . "
n");
print("What about -5?" . checkInteger(-5) . "
n");
print( "And -9.2?" . checkInteger(-9.2) . "
n");
?>

< ;/HTML>
Initialization array






$monthName = array(1=>"January", "February", "March",//Initialize an array
"April", "May", "June", "July", "August",
"September", "October", "November", "December");
print(" "May" in English is< ;B> $monthName[5] .
n");//Print the 6th element in the array
?>



Get the elements in the array




< ?
$monthName = array(
/*Define $monthName[1] to $monthName[12]*/
1=>"January", "February", "March",
"April", "May", "June",
"July", "August", "September",
"October", "November", "December",
/*Define $monthName ["Jan"] to $monthName["Dec"]*/
"Jan"=>"January", "Feb"=>"February",
"Mar"=>"March" , "Apr"=>"April", "May"=>"May", "Jun"=>"June",
"Jul"=>"July", "Aug" =>"August",
"Sep"=>"September", "Oct"=>"October",
"Nov"=>"November", "Dec"=>" December",
/*Define $monthName["Jan"] to $monthName["Dec"]*/
"January"=>"January", "February"=>"February",
"March"=>"March", "April"=>"April",
"May"=>"May", "June"=>"June",
"July "=>"July", "August"=>"August",
"September"=>"September", "October"=>"October",
"November"=> "November", "December"=>"December"
);
/*Print related elements*/
print("Month 5 is " . $monthName[5]. "
n");
print("Month Aug is " . $monthName["Aug "] . "
n");
print("Month June is " . $monthName["June"] . "< ;/B>
n");
?>


Create a multidimensional array




"North China" =>array(
"Beijing",
"Tianjin",
"Shijiazhuang"
),
"Northwest Region" => Array ( "Xi'an",
"Lhasa"
)
);
Print ("North China:". $ Cities ["North China"]; // Print $Cities["North China"][0]
?>

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