PHP Snippets
1 2 3 » ... 11array_pivot
Information
(PHP Version >= 3)Functions used in this snippet: is_array, count, is_null, array_key_exists, elseif.
Description
array array_pivot( array array, str key, str value )
array_pivot will take a multidimensional associative array and return a single dimension associative array with the keys from the column $key and the values from the column $value. If $key is set to null then it will return a regular array with integer keys.
Snippet
<?php
function array_pivot($array, $key, $value) {
if(!is_array($array))
return false;
if(count($array) === 0)
return array();
$ret = array();
foreach($array as $ray) {
if(is_null($key)) {
if(array_key_exists($value, $ray)) {
$ret[] = $ray[$value];
}
} elseif(array_key_exists($key, $ray) && array_key_exists($value, $ray)) {
$ret[$ray[$key]] = $ray[$value];
}
}
return $ret;
}
?>
Example
array_pivot Can be used in the following way:
<?php
$array = array(
array(
'id' => '1',
'name' => 'Scott',
'email' => 'fake@test.com'
),
array(
'id' => '4',
'name' => 'John',
'email' => 'john@test.com'
),
array(
'id' => '56',
'name' => 'Chris',
'email' => 'chris@test.com'
)
);
print_r(array_pivot($array, 'id', 'name'));
/*
Array
(
[1] => Scott
[4] => John
[56] => Chris
)
*/
print_r(array_pivot($array, null, 'email'));
/*
Array
(
[0] => fake@test.com
[1] => john@test.com
[2] => chris@test.com
)
*/
?>
array_select_key
Information
(PHP Version >= 3)Functions used in this snippet: array_intersect_key, array_fill_keys.
Description
array array_select_key( array array, array keys )
Returns any values from the array $array which have keys that are in the array $keys
Snippet
<?php
function array_select_key($array, $keys) {
return array_intersect_key($array, array_fill_keys($keys, 1));
}
?>
Example
array_select_key Can be used in the following way:
<?php
$post = array(
'name' => 'Scott',
'email' => 'fakeaddress@scott.com',
'phone' => '5555551212',
'submit' => 'Add Contact'
);
$wanted = array('name', 'email', 'phone');
$insert = array_select_key($post, $wanted);
print_r($insert);
/*
Array
(
[name] => Scott
[email] => fakeaddress@scott.com
[phone] => 5555551212
)
*/
?>
globsort
Information
(PHP Version >= 4.3.0)Functions used in this snippet: glob, print_r, empty, count, array_key_exists, var_dump, method, sort, array_keys.
Description
array globsort( string pattern, mixed flags, string sortby)
Globsort returns an array of files that meet the pattern pattern sorted by the parameter sortby. This uses the normal glob function and just sorts the resulting files by either: last modified date, created date, last accessed date, file size and file type.
You can change the way the different parameters sort the results by changing the sorts array from arsort to asort or vice versa.
The different parameters to pass in are based on the keys in the sorts and the methods array. By default they are: modified, created, accessed, size, type
Snippet
<?php
function globsort($pattern, $flags=NULL, $sortby='modified') {
$files = glob($pattern, $flags);
if(empty($files))
return array();
if($flags == GLOB_NOCHECK && count($files) == 1 && $files[0] == $pattern)
return array($pattern);
$methods = array(
'modified' => 'filemtime',
'created' => 'filectime',
'size' => 'filesize',
'type' => 'filetype',
'accessed' => 'fileatime'
);
$sorts = array(
'modified' => 'arsort',
'created' => 'arsort',
'size' => 'arsort',
'type' => 'asort',
'accessed' => 'arsort'
);
$method = array_key_exists($sortby, $methods) ? $methods[$sortby] : 'filemtime';
$sort = array_key_exists($sortby, $sorts) ? $sorts[$sortby] : 'arsort';
$tmp = array();
foreach($files as $file)
{
$tmp[$file] = $method($file);
}
$sort($tmp);
return array_keys($tmp);
}
?>
Example
globsort Can be used in the following way:
<?php
// Pretend we have a directory like this
// Created, Modified, Accessed, Size, Type, Name
// 2008-04-01, 2008-04-22, 2008-04-22, 152, file, file.txt
// 2008-03-01, 2008-04-24, 2008-04-26, 250, file, people.csv
// 2008-03-15, 2008-03-21, 2008-03-22, 34540, file, sound.wav
// 2008-01-04, 2008-04-25, 2008-04-26, 409, dir, Music
// Now some examples
// Default returns modified time with the most recently modified first
$files = globsort('*');
// Results in: Music/, people.csv, file.txt, sound.wav
// Sorted by Filesize
$files = globsort('*', NULL, 'filesize');
// Results in: sound.wav, Music/ people.csv, file.txt
// Sorted by Type
$files = glob('*', NULL, 'type');
// Results in: Music/, file.txt, people.wav, sound.wav
// Sorted by Last Accessed
$files = glob('*.*', NULL, 'accessed'); // Only filenames with extensions
// Results in: people.csv, file.txt, sound.wav
// Using one of the GLOB_* Constants and orders them by created date
$files = glob('*', GLOB_ONLYDIR, 'created');
// Results in: Music/ (there is only one folder...)
?>
find_filename
Information
(PHP Version >= 3)Functions used in this snippet: pathinfo, str_replace, file_exists.
Description
string find_filename( string filename )
Creates a unique filename if one already exists (similar to an operating systems naming schema Ex: file.ext already exists so the new file becomes file-1.ext)
Snippet
<?php
function find_filename($filename)
{
$info = pathinfo($filename);
$info['filename'] = str_replace('.' . $info['extension'], '', $filename);
$i = 1;
while(file_exists($filename))
{
$filename = $info['dirname'] . DIRECTORY_SEPARATOR . $info['filename'] . "-$i." . $info['extension'];
$i++;
}
return $filename;
}
?>
Example
find_filename Can be used in the following way:
<?php
<?php
// A file that does not exist
$filename = find_filename('file.txt'); // returns ./file.txt
touch($filename); // create file.txt so it exists now
$filename = find_filename('file.txt'); // returns ./file-1.txt
touch($filename) // create file-1.txt so it exists now
$filename = find_filename('file.txt'); // returns ./file-2.txt
// etc etc
?>
csv2array
Information
(PHP Version >= 3)Functions used in this snippet: file_exists, is_readable, file_get_contents, preg_replace, explode, array_map, unset, range, count, substr_count, reset.
Description
array csv2array( string file, boolean titles )
Takes a csv file and turns it into a multidimensional array. If you leave titles set to true it returns the array with the first line as the associative indexes of the array, if you set titles to false the first line is included in the values and the indexes are integers.
array2csv returns false if the file is not found or not readable.
Snippet
<?php
function csv2array($file, $titles=true)
{
if(!file_exists($file) || !is_readable($file))
{
return false;
}
$file = file_get_contents($file);
$file = preg_replace("/(\r\n|\r|\n\n)/ms", "\n", $file);
$lines = explode("\n", $file);
if($titles)
{
$titles = array_map('trim', explode(',',$lines[0]));
unset($lines[0]);
}
else
{
$titles = range(0, count(explode(',', $lines[0]), 1));
}
$return = array();
foreach($lines as $key => $line)
{
$peices = array_map('trim', explode(',', $line));
for($i=0;$i<count($peices);$i++)
{
$k = $i;
while(substr_count($peices[$k], '"') % 2 === 1)
{
$peices[$k] = $peices[$k] . ',' . $peices[$i + 1];
$i++;
unset($peices[$i]);
}
}
reset($peices);
foreach($peices as $column => $peice)
{
$return[$titles[$column]][$key] = $peice;
}
}
return $return;
}
?>
Example
csv2array Can be used in the following way:
<?php
<?php
/* In the example the csv is as follows:
Name,Title
Scott Roach,"Web Developer, CCi"
Annie Roach,Production Designer
*/
$csv = csv2array('file.csv');
print_r($csv);
/*
Array(
[Name] => Array(
[0] => Scott Roach
[1] => Annie Roach
)
[Title] => Array(
[0] => Web Developer, CCi
[1] => Production Designer
)
)
*/
$csv = csv2array('file.csv', false);
print_r($csv);
/*
Array(
[0] => Array(
[0] => Name
[1] => Scott Roach
[2] => Annie Roach
)
[1] => Array(
[0] => Title
[1] => "Web Developer, CCi"
[2] => Production Designer
)
)
*/
$csv = csv2array('non-existant-file.csv');
print_r($csv);
// False
?>
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