<?php
/*
Online PHP Examples with Source Code
website: http://4evertutorials.blogspot.in/
*/
$day = date('j'); //what day is it today
$month = date('n'); //what month are we in?
$year = date('Y'); //what year are we in?
//get the first first day of the month
$first_day_of_month = date('w',mktime(1,1,1,$month,1,$year));
$days_in_month = date('t'); //how many days in this month
print "SU\tMO\tTU\tWE\tTH\tFR\tSA
"; //print the weekday headers
//count ahead to the weekday of the first day of the month
for ($spacer = 0; $spacer < $first_day_of_month; $spacer++) {
print " \t";
}
for ($x = 1; $x <= $days_in_month; $x++) { //begin our main loop
//if we have gone past the end of the week, go to the next line
if ($spacer >= 7) { print "
"; $spacer = 0; }
//if the length of the current day is one, put a "0" in front of it
if (strlen($x) == 1) { $x = "0$x"; }
if ($x == $day) { //is this day the current day
print "$x\t"; //if so put an indicator
} else {
print "$x\t"; //otherwise just print it
}
$spacer++; //increment our spacer
}
?>
Saturday, August 24, 2013
Calendar Script PHP
Square Roots in PHP
Doing square roots in PHP is really simple, all you need to do is to call the function sqrt(). Lets see some code.
Other notes:
All PHP code needs “<?php” before and “?>” after the code to run.
The double slash “//” is a comment that PHP will ignore. For bigger comments, use “/* really big comment */”.
The “$int” is a variable. Use the dollar sign in front of a meaningful variable name to create variables in PHP.
sqrt() is the function that calculates the square root of a float number.
pow($float, $exp) is the function calculates a number $float to the power of $exp.
The “echo” function prints whatever values you pass to it in the HTML of the webpage.
<?php /* Online PHP Examples with Source Code website: http://4evertutorials.blogspot.in/ */ //Set number you would like to take square root $int = 9; //Take square root $sqrt = sqrt($int); //Display result echo $sqrt; ?>As you can see, simple to do. Now lets do it in a more mathematical way using the PHP function pow(), which is the power function. pow() has two inputs, pow($base, $n). $base is the base number you will raise to the $n power. Now usually, we would use this function to calculate powers like 22 (which is 4). However, if you know your math, we can raise numbers to the power of fractions, which is the same as taking the root of numbers. Not just the square root either, we can use this to find the cube root, fourth root, any root you would like to find. Now lets see some code for finding the cube root of 729.
<?php /* Online PHP Examples with Source Code website: http://4evertutorials.blogspot.in/ */ //Set base number and the exponent $base = 729; $exp = 1/3; //Take root $sqrt = pow($base, $exp); //Display result echo $sqrt; ?>The $base is the number we will be taking the power of $exp of. This way we can use the pow() function to not only find powers of numbers but the roots as well.
Other notes:
All PHP code needs “<?php” before and “?>” after the code to run.
The double slash “//” is a comment that PHP will ignore. For bigger comments, use “/* really big comment */”.
The “$int” is a variable. Use the dollar sign in front of a meaningful variable name to create variables in PHP.
sqrt() is the function that calculates the square root of a float number.
pow($float, $exp) is the function calculates a number $float to the power of $exp.
The “echo” function prints whatever values you pass to it in the HTML of the webpage.
By: 4evertutorials
On 8/24/2013
Saturday, August 17, 2013
Convert bytes to B, KB, MB, GB, TB, PB, EB, ZB, YB
Simple PHP function that formats the bytes to the desired form. Possible unit options are:
Byte (B)
Kilobyte (KB)
Megabyte (MB)
Gigabyte (GB)
Terabyte (TB)
Petabyte (PB)
Exabyte (EB)
Zettabyte (ZB)
Yottabyte (YB)
Function takes three parameter: (bytes mandatory, unit optional, decimals optional):
<?php
/*
Online PHP Examples with Source Code
website: http://4evertutorials.blogspot.in/
*/
function byteFormat($bytes, $unit = "", $decimals = 2) {
$units = array('B' => 0, 'KB' => 1, 'MB' => 2, 'GB' => 3, 'TB' => 4,
'PB' => 5, 'EB' => 6, 'ZB' => 7, 'YB' => 8);
$value = 0;
if ($bytes > 0) {
// Generate automatic prefix by bytes
// If wrong prefix given
if (!array_key_exists($unit, $units)) {
$pow = floor(log($bytes)/log(1024));
$unit = array_search($pow, $units);
}
// Calculate byte value by prefix
$value = ($bytes/pow(1024,floor($units[$unit])));
}
// If decimals is not numeric or decimals is less than 0
// then set default value
if (!is_numeric($decimals) || $decimals < 0) {
$decimals = 2;
}
// Format output
return sprintf('%.' . $decimals . 'f '.$unit, $value);
}
?>
Usage
<?php /* Online PHP Examples with Source Code website: http://4evertutorials.blogspot.in/ */ echo byteFormat(4096, "B") ."\n"; echo byteFormat(8, "B", 2) . "\n"; echo byteFormat(1, "KB", 5) . "\n"; echo byteFormat(1073741824, "B", 0) . "\n"; echo byteFormat(1073741824, "KB", 0) . "\n"; echo byteFormat(1073741824, "MB") . "\n"; echo byteFormat(1073741824) . "\n"; echo byteFormat(1073741824, "TB", 10) . "\n"; echo byteFormat(1099511627776, "PB", 6) . "\n"; ?>
By: 4evertutorials
On 8/17/2013
PHP Memory Usage
This is a simple example of a class, which can be used to collect the PHP script memory usage information and to print all information.
PHP Memory Usage - Class
<?php
/*
Online PHP Examples with Source Code
website: http://4evertutorials.blogspot.in/
*/
class MemoryUsageInformation {
private $real_usage;
private $statistics = array();
// Memory Usage Information constructor
public function __construct($real_usage = false) {
$this->real_usage = $real_usage;
}
// Returns current memory usage with or without styling
public function getCurrentMemoryUsage($with_style = true) {
$mem = memory_get_usage($this->real_usage);
return ($with_style) ? $this->byteFormat($mem) : $mem;
}
// Returns peak of memory usage
public function getPeakMemoryUsage($with_style = true) {
$mem = memory_get_peak_usage($this->real_usage);
return ($with_style) ? $this->byteFormat($mem) : $mem;
}
// Set memory usage with info
public function setMemoryUsage($info = '') {
$this->statistics[] = array('time' => time(),
'info' => $info,
'memory_usage' => $this->getCurrentMemoryUsage());
}
// Print all memory usage info and memory limit and
public function printMemoryUsageInformation() {
foreach ($this->statistics as $satistic) {
echo "Time: " . $satistic['time'] .
" | Memory Usage: " . $satistic['memory_usage'] .
" | Info: " . $satistic['info'];
echo "\n";
}
echo "\n\n";
echo "Peak of memory usage: " . $this->getPeakMemoryUsage();
echo "\n\n";
}
// Set start with default info or some custom info
public function setStart($info = 'Initial Memory Usage') {
$this->setMemoryUsage($info);
}
// Set end with default info or some custom info
public function setEnd($info = 'Memory Usage at the End') {
$this->setMemoryUsage($info);
}
// Byte formatting
private function byteFormat($bytes, $unit = "", $decimals = 2) {
$units = array('B' => 0, 'KB' => 1, 'MB' => 2, 'GB' => 3, 'TB' => 4,
'PB' => 5, 'EB' => 6, 'ZB' => 7, 'YB' => 8);
$value = 0;
if ($bytes > 0) {
// Generate automatic prefix by bytes
// If wrong prefix given
if (!array_key_exists($unit, $units)) {
$pow = floor(log($bytes)/log(1024));
$unit = array_search($pow, $units);
}
// Calculate byte value by prefix
$value = ($bytes/pow(1024,floor($units[$unit])));
}
// If decimals is not numeric or decimals is less than 0
// then set default value
if (!is_numeric($decimals) || $decimals < 0) {
$decimals = 2;
}
// Format output
return sprintf('%.' . $decimals . 'f '.$unit, $value);
}
}
?>
Usage of Class
<?php
/*
Online PHP Examples with Source Code
website: http://4evertutorials.blogspot.in/
*/
// Create new MemoryUsageInformation class
$m = new MemoryUsageInformation(true);
// Set start
$m->setStart();
// Create example array
$a = array();
// Set memory usage before loop
$m->setMemoryUsage('Before Loop');
// Fill array with
for($i = 0; $i < 100000; $i++) {
$a[$i] = uniqid();
}
// Set memory usage after loop
$m->setMemoryUsage('After Loop');
// Unset array
unset($a);
// Set memory usage after unset
$m->setMemoryUsage('After Unset');
// Set end
$m->setEnd();
// Print memory usage statistics
$m->printMemoryUsageInformation();
?>
CHECK Output of PHP Memory class
By: 4evertutorials
On 8/17/2013
Objects to Array php
Every PHP coders have come accross Arrays and stdClass Objects (belongs to PHP Predefined Classes). Sometimes it’s very useful convert Objects to Arrays and Arrays to Objects. This is easy if arrays and objects are one-dimensional, but might be little tricky if using multidimensional arrays and objects.
This post defines two simple function to convert
:multidimensional Objects to Arrays
:multidimensional Arrays to Objects
Function to Convert stdClass Objects to Multidimensional Arrays
Objects to Array php
<?php
/*
Online PHP Examples with Source Code
website: http://4evertutorials.blogspot.in/
*/
function objectToArray($d) {
if (is_object($d)) {
// Gets the properties of the given object
// with get_object_vars function
$d = get_object_vars($d);
}
if (is_array($d)) {
/*
* Return array converted to object
* Using __FUNCTION__ (Magic constant)
* for recursive call
*/
return array_map(__FUNCTION__, $d);
}
else {
// Return array
return $d;
}
}
?>
Function to Convert Multidimensional Arrays to stdClass Objects
<?php
/*
Online PHP Examples with Source Code
website: http://4evertutorials.blogspot.in/
*/
function arrayToObject($d) {
if (is_array($d)) {
/*
* Return array converted to object
* Using __FUNCTION__ (Magic constant)
* for recursive call
*/
return (object) array_map(__FUNCTION__, $d);
}
else {
// Return object
return $d;
}
}
?>
Function usage
<?php /* Online PHP Examples with Source Code website: http://4evertutorials.blogspot.in/ */ // Create new stdClass Object $init = new stdClass; // Add some test data $init->foo = "Test data"; $init->bar = new stdClass; $init->bar->baaz = "Testing"; $init->bar->fooz = new stdClass; $init->bar->fooz->baz = "Testing again"; $init->foox = "Just test"; // Convert array to object and then object back to array $array = objectToArray($init); $object = arrayToObject($array); // Print objects and array print_r($init); echo "\n"; print_r($array); echo "\n"; print_r($object); ?>
By: 4evertutorials
On 8/17/2013
Subscribe to:
Posts (Atom)
