Several functions required for getting started with PHP _ PHP Tutorial

Several code functions required for getting started with PHP. Classic loop example HTMLHEADTITLE classic loop example TITLEHEADBODY? For ($ counter1; $ counter6; $ counter ++) loop 6 Times {print (Bcounteris $ counterBBRn); print 6 times }? BODYH Classic loop example


Classic loop example


For ($ counter = 1; $ counter <= 6; $ counter ++) // 6 cycles
{
Print (" Counter is $ counter
N "); // Print 6 times
}
?>



Advanced application of


Advanced application of


/*
** Print necessary instructions
*/
Print (" How many days are there from Monday?N ");
Print ("

N ");
For ($ currentDate = date ("U"); // defines the $ currentDate time format
Date ("l", $ currentDate )! = "Monday"; // determines whether the current system time is Monday.
$ CurrentDate + = (60*60*24) // add 1 day to the current time
{
/*
** Print the time name
*/
Print ("
1. ". Date (" l ", $ currentDate)." n ");
   }
   Print ("

N ");
?>



Simple function call:


Simple functions



Function printBold ($ inputText) // defines the function printBold ()
{
Print (" ". $ InputText .""); // Print $ inputText
}
Print ("This line is not aggravated!
N "); // Print the string directly
PrintBold ("This line is aggravated !!! "); // Call the function printBold () function
Print ("
N ");
Print ("This line is not aggravated!
N "); // Print the string directly
?>




Functions with return values


Functions with return values



Function makeBold ($ inputText) // defines the function makeBold () function
{
$ BoldedText =" ";
$ BoldedText. = $ inputText;
$ BoldedText. ="";
Return ($ boldedText); // return the variable $ boldedText
}
Print ("This line is not aggravated !!!
N "); // Print the string directly
Print (makeBold ("This line is aggravated !!! ")."
N "); // call the function makeBold () function
Print ("This line is not aggravated !!!
N "); // Print the string directly
?>




Functions with default parameters


Functions with default parameters



Function printColored ($ Text, $ Color = "black") // defines the function.
{
Print ("$ Text"); // Obtain the content and color of the string.
}
PrintColored ("This is a black color word! "); // Call the function
Print ("

N ");
PrintColored ("This is a blue color word! "," Blue "); // call the function
Print ("
N ");
?>




Identify whether it is an integer by using the delivery algorithm


Judge integer


Function checkInteger ($ Number)
{
If ($ Number> 1)
{
/* The integer minus 1 is still an integer */
Return (checkInteger ($ Number-1 ));
}
Elseif ($ Number <0)
{
/* For a negative number ,*/
/* You can analyze its absolute value */
Return (checkInteger (-1) * $ Number-1); // Obtain the absolute value and analyze the negative Number by an integer.
}
Else
{
If ($ Number> 0) AND ($ Number <1 ))
{
Return ("Of course not ");
}
Else
{
/* 0 and 1 are integers */
/* According to the mathematical definition */
Return ("yes ");
}
}
}
Print (" Is 0 an integer?".
CheckInteger (0 )."
N ");
Print (" Is 7 an integer?".
CheckInteger (7 )."
N ");
Print (" What about 3.5?". CheckInteger (3.5 )."
N ");
Print (" What about-5?". CheckInteger (-5 )."
N ");
Print (" And-9.2?". CheckInteger (-9.2 )."
N ");
?>

Initialize an array


Initialize an array


$ MonthName = array (1 => "January", "February", "March", // Initialize an array
"Maid", "May", "June", "July", "August ",
"September", "October", "November", "December ");
Print ("May in English" is$ MonthName [5].
N "); // Print the 6th elements in the array
?>




Obtain the elements in the array.


Obtain the elements in the array.

$ MonthName = array (
/* Define $ monthName [1] to $ monthName [12] */
1 => "January", "February", "March ",
"Maid", "May", "June ",
"July", "August", "September ",
"October", "November", "December ",
/* Define $ monthName ["Jan"] to $ monthName ["Dec"] */
"Jan" => "January", "Feb" => "February ",
"Mar" => "March", "Apr" => "yml ",
"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 ("Month5Is". $ MonthName [5]."
N ");
Print ("MonthAugIs". $ MonthName [" Aug "]."
N ");
Print ("MonthJuneIs". $ MonthName [" June "]."
N ");
?>



Create a multi-dimensional array


Create a multi-dimensional array

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



PHP 4.0 supports table printing


Implement table-like printing


/*
** Table-based data
*/
Print ("

N "); // table startFor ($ Row = 1; $ Row <= 12; $ Row ++){Print (" N "); // start line// Do each columnFor ($ Column = 1; $ Column <= 12; $ Column ++){Print (" ");}Print (" N "); // The end of the row}Print ("

"); // Start column Print ($ Row * $ Column); // table element product Print ("

N "); // The end of the table.
?>



View system variables


View PHP environment variables


Print ("the name of the file you are using is :");
Print (_ FILE __);
Print ("
N ");
Print ("");
Print ("your operating system is :");
Print (PHP_ OS );
Print ("");
Print ("Your php version is :");
Print (PHP_VERSION)
?>



Open local or remote files


Open local or remote files


Print ("open file n through http ");
// Open a file through the http protocol
If (! ($ MyFile = fopen ("d: web/php/test/data.txt", "r ")))
{
Print ("file cannot be opened ");
Exit;
}
While (! Feof ($ myFile) // Loop
{
// Read the object content by row
$ MyLine = fgetss ($ myFile, 255 );
Print ("$ myLine
N ");
}
// Close the file handle
Fclose ($ myFile );
?>



Comparison of Methods for opening files


Read file content


// Open the file and print every character of the file
If ($ myFile = fopen ("data.txt", "r "))
{
While (! Feof ($ myFile ))
{
$ MyCharacter = fgetc ($ myFile );
Print ($ myCharacter );
}
Fclose ($ myFile );
}
?>

// Print each row of the file while opening the file
If ($ myFile = fopen ("data.txt", "r "))
{
While (! Feof ($ myFile ))
{
$ MyLine = fgets ($ myFile, 255 );
Print ($ myLine );
}
Fclose ($ myFile );
}
?>

/* Open the file and print each row of the file,
Remove the HTML language from the retrieved string.
*/
If ($ myFile = fopen ("data.txt", "r "))
{
While (! Feof ($ myFile ))
{
$ MyLine = fgetss ($ myFile, 255 );
Print ($ myLine );
}
Fclose ($ myFile );
}
?>



Common file access attributes


Common file access attributes




Print ("file owner (UID value ):");
Print (fileowner ("data.txt ")."
");
Print ("file size :");
Print (filesize ("data.txt ")."
");
Print ("file type :");
Print (filetype ("data.txt ")."
");
?>

Call text file content


Call text file content

// Print each line while opening the file
$ MyFile = file ("data.txt ");
For ($ index = 0; $ index <count ($ myFile); $ index ++)
{
Print ($ myFile [$ index]."
");
}
?>




Create a directory function


Create a directory function


If (mkdir ("myDir1", 0777) // create a directory function
{
Print ("directory created successfully"); // Directory created successfully
}
Else
{
Print ("directory creation failed! "); // Directory creation failed
}
?>



Browse directory


Browse directory


// Use the table to browse the directory structure
Print ("















N ");// Create the table headerPrint (" N ");Print (" N ");Print (" N ");Print (" N ");$ MyDirectory = opendir ("."); // Create an operation directory handle// Read every sub-item in the directoryWhile ($ entryName = readdir ($ myDirectory )){Print (" ");Print (" ");Print (" ");Print (" N ");}Closedir ($ myDirectory); // Close the DirectoryPrint ("

File name	File size
$ EntryName	"); Print (filesize ($ entryName )); Print ("

N ");
?>



PHP information


PHP information


Phpinfo ();
?>



Common numeric judgment functions


Common numeric judgment functions


// Determine the array
$ Colors = array ("red", "blue", "green ");
If (is_array ($ colors ))
{
Print ("colors is an array "."
");
}
// Double-precision data determination
$ Temperature = 15.23;
If (is_double ($ Temperature ))
{
Print ("Temperature is a double "."
");
}
// Integer judgment
$ PageCount = 2234;
If (is_integer ($ PageCount ))
{
Print ("$ PageCount is an integer "."
");
}
// Object judgment
Class widget
{
Var $ name;
Var $ length;
}
$ Thing = new widget;
If (is_object ($ thing ))
{
Print ("thing is an object "."
");
}
// Character judgment
$ Greeting = "Hello ";
If (is_string ($ Greeting ))
{
Print ("Greeting is a string "."
");
}
?>



File upload interface


File upload interface


If ($ UploadAction ){
$ UploadAction = 0;
$ TimeLimit = 60;
/* Set the default time-out period to 30 s. If the value is set to 0, the time-out period is not limited */
Set_time_limit ($ TimeLimit );
If ($ Upfile! = "None ")&&
($ Upfile! = ""))
{
$ Filepath = "d: webwebphptest"; // upload the file storage path
$ FileName = $ Filepath. $ Upfile_name;
If ($ Upfile_size <1024) // upload the file size
{$ FileSize = (string) $ Upfile_size. "byte ";}
Elseif ($ Upfile_size <(1024*1024 ))
{
$ FileSize = number_format (double) ($ Upfile_size/1024), 1). "KB ";
}
Else
{
$ FileSize = number_format (double) ($ Upfile_size/(1024*1024), 1). "MB ";
}
If (! File_exists ($ FileName ))
{
If (copy ($ Upfile, $ FileName ))
{Unlink ($ Upfile );
Echo"

N ";
Echo "file $ Upfile_name has been uploaded successfully! ";
Echo"

N ";
Echo "file location: $ FileName ";
Echo"

N ";
Echo "file size: $ FileSize ";
Echo"

N ";
}
Else
{Echo "file $ Upfile_name Upload failed! ";}
}
Else
{Echo "file $ Upfile_name already exists! ";}
}
Else
{Echo "you have not selected any file upload! ";}
Set_time_limit (30); // restores the default timeout value.
}
?>

Html head title classic loop example/TITLE/head body? For ($ counter = 1; $ counter = 6; $ counter ++) // Loop 6 Times {print (Bcounteris $ counter/BBRn); // print 6 times }? /BODY/H...