The document discusses PHP functions for ZIP files, filesystems, and calendars. It provides examples of ZIP functions like zip_open() and zip_read() to open and read ZIP files. Filesystem functions like basename() and is_writable() are described to manipulate system files. Calendar functions like cal_days_in_month() and cal_to_jd() allow working with different calendar formats by converting between Julian dates and calendar representations. Code examples demonstrate using several of these functions.

1. PHP Functions
Reber Jahwar M.

2. Chosen functions :
ZIP Functions
Filesystem Functions
Calendar Functions

3. • The PHP Zip files functions allows you to read and edit or close the ZIP
files.
• The ZIP include 10 different functions :
Functions Description PHP
Zip_close() Closes a ZIP file 4
Zip_entry_close() Closes an entry in the ZIP file 4
zip_entry_compressedsize() Returns the compressed size of an entry in the ZIP file 4
Zip_entry_compressionmethod() Returns the compression method of an entry in the ZIP file 4
Zip_entry_filesize() Returns the actual file size of an entry in the ZIP file 4
Zip_entry_name() Returns the name of an entry in the ZIP file 4
Zip_entry_open() Opens an entry in the ZIP file for reading 4
Zip_enrty_read() Reads from an open entry in the ZIP file 4
Zip_open() Opens a ZIP file 4
Zip_read() Reads the next entry in a ZIP file 4
ZIP Functions

4. Note : ZIP functions and the Zip library is not enabled by default and
must be downloaded !
<?php
$zip = zip_open("test.zip");
zip_read($zip);
// some code
zip_close($zip);
?>
<?php
$zip = zip_open("test.zip");
{
while ($zip_entry = zip_read($zip))
{
echo "Name: " .
zip_entry_name($zip_entry) ;
echo "Compressed Size: "
zip_entry_compressedsize($zip_entry);
}
zip_close($zip);
}
?>
Examples :

5. • The PHP filesystem functions allow you to access and manipulate
the system files in the PC .
• Filesystem include more than 70 functions
basename() Returns the filename component of a path 3
disk_total-space() Returns the total size of a directory 4
Is_excutable() Checks whether a file is executable 3
is_uploaded_file() Checks whether a file was uploaded via HTTP POST 3
stat() Returns information about a file 3
realpath() Returns the absolute pathname 4
is_writable() Checks whether a file is writeable 4
fgetc() Returns a character from an open file 3
Filesystem Functions :

6. Note :The filesystem functions are default no installation needed to use these functions.
<?php
$path = "/CR90/file.php";
echo basename($path) ."<br/>";
?>
<?php
print_r(pathinfo("/CR90/file.txt"));
?>
Output :
(
[dirname] => /CR90
[basename] => file.txt
[extension] => txt
)
Examples :
Output :
file.php

7. • The calendar functions are useful when working with different calendar
formats and use it inside the PHP code for some reasons .
• The standard it is based on is the Julian day count .
• Julian day count JDC of today is ( 3 February 2013 ) .
• If we want to use another type of calendar format we must first
convert to Julian day count, then to the calendar format.
~ The calendar function in PHP include 18 different type of
functions :
Calendar :

8. cal_days_in_month() Returns the number of days in a month for a specified year 4
cal_from_jd() Converts a Julian day count into a date of a specified calendar 4
cal_info() Returns information about a given calendar 4
cal_to_jd() Converts a date to Julian day count 4
easter_date() Returns the Unix timestamp for midnight on Easter of a specified year 3
GregorianToJD() Converts a Gregorian date to a Julian day count 3
JDDayOfWeek() Returns the day of a week 3
JDMonthName() Returns a month name 3
JDToGregorian() Converts a Julian day count to a Gregorian date 3
Note :The windows version of PHP has built-in support for the calendar extension. So, the calendar
functions will work automatically..
Calendar Functions :

9. Output :
There was 30 days in January 2013
Output :
Sunday
<?php
$d=cal_days_in_month(CAL_GREGORIAN,1,2013);
echo("There was $d days in January 2013");
?>
<?php
$jd=cal_to_jd(CAL_GREGORIAN,date("m"),date("d"),date("Y"));
echo(jddayofweek($jd,1));
?>
Examples :