Category Archives: PHP

PHP

PHP developers should try Python.

PHP and Python both are dynamic typed language, so there is no point the discuss anything related in this aspect. Exception is first class citizen

try:
    a = 1 / 0
except:
    print 'Caught'

try:

a = 1 / 0

except:

print 'Caught'

Prints ‘Caught’ Let’s look at PHP:

try{ 
    $a = 1 / 0; 
}catch (Exception $e){ 
    print "Caught"; 
} 
I cannot believe by default this still gives me PHP Warning:  Division by zero

try{

$a = 1 / 0;

}catch (Exception $e){

print "Caught";

}

I cannot believe by default this still gives me PHP Warning: Division by zero

Better functions Imagine you can write functions like this

def marry(man, woman):
    ...

marry('John', 'Julie')
marry(woman='Julie', man='John')

def party(*args):
    for person in args:
      print person

party('John')
party('John', 'Ben', ...)

def save(name, *kwargs):
    data = {'name': name}
    data.update(kwargs)
    write_to_db(data)

save('John')
save('John', gender='male', birthday='01/01/1970')

def marry(man, woman):

...

marry('John', 'Julie')

marry(woman='Julie', man='John')

def party(*args):

for person in args:

print person

party('John')

party('John', 'Ben', ...)

def save(name, *kwargs):

data = {'name': name}

data.update(kwargs)

write_to_db(data)

save('John')

save('John', gender='male', birthday='01/01/1970')

Short-lived vs Long-lived Almost all PHP scripts are short-lived, including most frameworks, which… Read More »

PHP Snippet: Get dates from a given range

function get_range_dates($start, $end){
  $days = array();
  $start_tmp = explode("-",$start);
  $end_tmp = explode("-",$end);
  $start_time = mktime(1,1,1, $start_tmp[1], $start_tmp[2], $start_tmp[0]);
  $end_time = mktime(1,1,1, $end_tmp[1], $end_tmp[2], $end_tmp[0]);       
  while($start_time &lt;= $end_time){           
    $days[] = date("Y-m-d", $start_time);
    $start_time += 86400;
  }
  return $days;
}

//calling the function
get_range_dates('2011-02-01', '2011-03-08');

function get_range_dates($start, $end){

$days = array();

$start_tmp = explode("-",$start);

$end_tmp = explode("-",$end);

$start_time = mktime(1,1,1, $start_tmp[1], $start_tmp[2], $start_tmp[0]);

$end_time = mktime(1,1,1, $end_tmp[1], $end_tmp[2], $end_tmp[0]);

while($start_time <= $end_time){

$days[] = date("Y-m-d", $start_time);

$start_time += 86400;

}

return $days;

}

//calling the function

get_range_dates('2011-02-01', '2011-03-08');

Result:

Array ( [0] => 2011-02-01 [1] => 2011-02-02 [2] => 2011-02-03 [3] => 2011-02-04 [4] => 2011-02-05 [5] => 2011-02-06 [6] => 2011-02-07 [7] => 2011-02-08 [8] => 2011-02-09 [9] => 2011-02-10 [10] => 2011-02-11 [11] => 2011-02-12 [12] => 2011-02-13 [13] => 2011-02-14 [14] => 2011-02-15 [15] => 2011-02-16 [16] => 2011-02-17 [17] => 2011-02-18 [18] => 2011-02-19 [19] => 2011-02-20 [20] => 2011-02-21 [21] => 2011-02-22 [22] => 2011-02-23 [23] => 2011-02-24 [24] => 2011-02-25 [25] => 2011-02-26 [26] => 2011-02-27 [27] => 2011-02-28 [28] => 2011-03-01 [29] => 2011-03-02 [30] => 2011-03-03 [31] => 2011-03-04 [32] => 2011-03-05 [33] => 2011-03-06 [34] => 2011-03-07 [35] => 2011-03-08 )

Array ( [0] => 2011-02-01 [1] => 2011-02-02 [2] => 2011-02-03 [3] => 2011-02-04 [4] => 2011-02-05 [5] => 2011-02-06 [6] => 2011-02-07 [7] => 2011-02-08 [8] => 2011-02-09 [9] => 2011-02-10 [10] => 2011-02-11 [11] => 2011-02-12 [12] => 2011-02-13 [13] => 2011-02-14 [14] => 2011-02-15 [15] => 2011-02-16 [16] => 2011-02-17 [17] => 2011-02-18 [18] => 2011-02-19 [19] => 2011-02-20 [20] => 2011-02-21 [21] => 2011-02-22 [22] => 2011-02-23 [23] => 2011-02-24 [24] => 2011-02-25 [25] => 2011-02-26 [26] => 2011-02-27 [27] => 2011-02-28 [28] => 2011-03-01 [29] => 2011-03-02 [30] => 2011-03-03 [31] => 2011-03-04 [32] => 2011-03-05 [33] => 2011-03-06 [34] => 2011-03-07 [35] => 2011-03-08 )

PHP Tutorial: Server load bar chart

Server Load: Just a quick tutorial on drawing the server load bar chart in php: serverload.php

function get_server_load($windows = 0)
{
    $os = strtolower(PHP_OS);
    if (strpos($os, "win") === false)
    {
        if (file_exists("/proc/loadavg"))
        {
            $load = file_get_contents("/proc/loadavg");
            $load = explode(' ', $load);
            return $load;
        }
        elseif (function_exists("shell_exec"))
        {
            $load = explode(' ', `uptime`);
            return $load;
        }
        else
        {
            return "";
        }
    }
}
list($one, $two, $three) = get_server_load();
//bar width
$width = 300;
//bar height
$height = 20;
$real_load = $one / 2;
$img_handle = imagecreate ($width, $height);
$box_color = imagecolorallocate ($img_handle, 255, 255, 255);
$bar_color = imagecolorallocate ($img_handle, 0, 195, 255);
$text_color = imagecolorallocate ($img_handle, 0, 0, 0);
$real_load = $real_load > 1 ? 1 : $real_load;
imagerectangle ( $img_handle , 0 , 0 , $width, $height, $box_color);
imagefilledrectangle ( $img_handle , 0 , 0 , (int)$width*$real_load, $height, $bar_color);
imagestring($img_handle, 5, $width/2-15, $height/2-7, ($real_load*100).'%', $text_color);
header ("Content-type: image/png");
imagepng ($img_handle);

function get_server_load($windows = 0)

{

$os = strtolower(PHP_OS);

if (strpos($os, "win") === false)

{

if (file_exists("/proc/loadavg"))

{

$load = file_get_contents("/proc/loadavg");

$load = explode(' ', $load);

return $load;

}

elseif (function_exists("shell_exec"))

{

$load = explode(' ', `uptime`);

return $load;

}

else

{

return "";

}

list($one, $two, $three) = get_server_load();

//bar width

$width = 300;

//bar height

$height = 20;

$real_load = $one / 2;

$img_handle = imagecreate ($width, $height);

$box_color = imagecolorallocate ($img_handle, 255, 255, 255);

$bar_color = imagecolorallocate ($img_handle, 0, 195, 255);

$text_color = imagecolorallocate ($img_handle, 0, 0, 0);

$real_load = $real_load > 1 ? 1 : $real_load;

imagerectangle ( $img_handle , 0 , 0 , $width, $height, $box_color);

imagefilledrectangle ( $img_handle , 0 , 0 , (int)$width*$real_load, $height, $bar_color);

imagestring($img_handle, 5, $width/2-15, $height/2-7, ($real_load*100).'%', $text_color);

header ("Content-type: image/png");

imagepng ($img_handle);

html

<img src="serverload.php" style="border:1px solid black;"/>

1	<img src="serverload.php" style="border:1px solid black;"/>

My dokuwiki plugins

A while ago I wrote some dokuwiki plugins: User Home Page Auto Include Index Table Math Modal Popup ACL Made Easy

How do you rotate a two dimensional array?

http://stackoverflow.com/questions/42519/how-do-you-rotate-a-two-dimensional-array This is the best so far I have come up with PHP, can anyone refine this for me??

$b = array();
$a = array(array(1,2,3,4),array(5,6,7,8),array(9,0,1,2),array(3,4,5,6));

while(count($a)>0)
{
    $b[count($a[0])-1][] = array_shift($a[0]);
    if (count($a[0])==0)
    {
         array_shift($a);
    }
}

$b = array();

$a = array(array(1,2,3,4),array(5,6,7,8),array(9,0,1,2),array(3,4,5,6));

while(count($a)>0)

{

$b[count($a[0])-1][] = array_shift($a[0]);

if (count($a[0])==0)

{

array_shift($a);

}

Tutorial – Twitter API using OAuth Single Access Token

Hello guys, In this blog I am going to show you step by step how to retrieve and reply tweets using a single twitter account. I was asked to write up a service to monitor tweets of a twitter account, then I went to the twitter API to read up how to get this done,… Read More »

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