Consider the following:
<input type="hidden" name="random[variable][here]" value="valueofrandom"/>
Is there a better way to retrieve its value if we have the name as a string? The following works, but it doesn't seem very smart.
function getPostValueFromName($name) {
// Example string name: random[variable][here]
$parts = preg_split('/\[|\]/i', $name, -1, PREG_SPLIT_NO_EMPTY);
if (isset($parts[3])) {
return $_POST[$parts[0]][$parts[1]][$parts[2][$parts[3]]];
} elseif (isset($parts[2])) {
return $_POST[$parts[0]][$parts[1]][$parts[2]];
} elseif (isset($parts[1])) {
return $_POST[$parts[0]][$parts[1]];
} else {
return $_POST[$parts[0]];
}
}
Thanks!
I use https://github.com/symfony/PropertyAccess for things like this.
Using it, you can get random[variable][here] with
$accessor = new PropertyAccessor();
$val = $accessor->getValue($_POST, 'random.variable.here');
// or
$val = $accessor->getValue($_POST, 'random[variable][here]');
Related
I am creating this array with the below code:
$ignored = array();
foreach(explode("\n", $_POST["ignored"]) as $ignored2) {
$ignored[] = $ignored2;
}
and i want to check if any item inside the array is LIKE a variable. I have this so far:
if(in_array($data[6], $ignored)) {
but I'm not sure what to do with the LIKE
in_array() doesn't provide this type of comparison. You can make your own function as follows:
<?php
function similar_in_array( $sNeedle , $aHaystack )
{
foreach ($aHaystack as $sKey)
{
if( stripos( strtolower($sKey) , strtolower($sNeedle) ) !== false )
{
return true;
}
}
return false;
}
?>
You can use this function as:
if(similar_in_array($data[6], $ignored)) {
echo "Found"; // ^-search ^--array of items
}else{
echo "Not found";
}
Function references:
stripos()
strtolower()
in_array()
Well, like is actually from SQL world.
You can use something like this:
$ignored = array();
foreach(explode("\n", $_POST["ignored"]) as $ignored2) {
$ignored[] = $ignored2;
if ( preg_match('/^[a-z]+$/i', $ignored2) ) {
//do what you want...
}
}
UPDATE: Well, I found this answer, may be it's what you need:
Php Search_Array using Wildcard
Here is a way to do it that can be customized fairly easily, using a lambda function:
$words = array('one','two','three','four');
$otherwords = array('three','four','five','six');
while ($word = array_shift($otherwords)) {
print_r(array_filter($words, like_word($word)));
}
function like_word($word) {
return create_function(
'$a',
'return strtolower($a) == strtolower(' . $word . ');'
);
}
http://codepad.org/yAyvPTIq
To add different checks, simply add more conditions to the return. To do it in a single function call:
while ($word = array_shift($otherwords)) {
print_r(find_like_word($word, $words));
}
function find_like_word($word, $words) {
return array_filter($words, like_word($word));
}
function like_word($word) {
return create_function(
'$a',
'return strtolower($a) == strtolower(' . $word . ');'
);
}
My problem is basically, I will be trying to get data from a table called, 'rank' and it will have data formatted like, "1,2,3,4,5" etc to grant permissions. So Basically I am trying to make it an array and find if one number is there in the array. Basically making it an array is not working. How would I get this done? Here is my code below:
<?php
function rankCheck($rank) {
$ranks = "1,2,3,4,5";
print_r($uRanks = array($ranks));
if(in_array($rank, $uRanks)) {
return true;
} else {
return false;
}
}
if(rankCheck(5) == true) { echo "Hello"; } else { echo "What?"; }
?>
This code returns false, while it should return true. This is just a basic algorithm.
The print_r Display:
Array ( [0] => 1,2,3,4,5 )
If you know for sure your delimiter is a comma, try this:
$ranks = explode(',',$rank);
where $rank is your string.
That's simple, you explode the $ranks variable by comma ,:
$ranks = "1,2,3,4,5";
$uRanks = explode(',',$ranks);
//$uRanks would now be array(1,2,3,4,5);
if(in_array($rank, $uRanks)) {
//..rest of your code
You should:
$uRanks = explode(',', $ranks);
instead of:
$uRanks = array($ranks);
to make this as array.
Problem solved. I used the explode function instead like this:
<?php
function rankCheck($rank) {
$ranks = "1,2,3,4,5";
print_r($uRanks = explode(',', $ranks));
if(in_array($rank, $uRanks)) {
return true;
} else {
return false;
}
}
if(rankCheck(5) == true) { echo "Hello"; } else { echo "What?"; }
?>
I'm trying to check if the following is empty or not.
{"players":""}
I have a function that gets that from an api/site and.. well, heres the code.
function getPlayers($server) {
// Fetches content from url and json_decodes it
$playersList = getUrl('http://api.iamphoenix.me/list/?server_ip=' . $server);
// Attempting to check if it's empty.
if ($playersList != "") {
// convert list of comma-separated names into array
$players = explode(',', $playersList->players);
foreach ($players as $player) {
echo '<img title="'.$player.'" src="https://minotar.net/avatar/'.$player.'/32">';
}
} else {
return 'empty';
}
}
However, using !=, empty(), or isset(), I still get an empty string, example:
https://minotar.net/avatar//32
Where it should be..
https://minotar.net/avatar/Notch/32
When it's empty, I'd like it to just return 'empty'.
I'm not sure what I'm doing wrong. Any ideas?
In pure php you can check the url segments like
$_SERVER['REQUEST_URI_PATH'] = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
$segments = explode('/', $_SERVER['REQUEST_URI_PATH']);
if($segments[2] == '') {
}
//or
if(empty($segments[2])) {
}
//or do your condition
if you are using codeigniter you might say
if(empty($this->uri->segment(2)))
But be sure you loaded the url helper
Hope I understand your question!
Since you were able to have some output, see my changes in the codes.
function getPlayers($server) {
// Fetches content from url and json_decodes it
$playersList = getUrl('http://api.iamphoenix.me/list/?server_ip=' . $server);
// Attempting to check if it's empty.
if ($playersList != "") {
// convert list of comma-separated names into array
$players = explode(',', $playersList->players);
// check conversion
if(is_array($players) && !empty($players){
foreach ($players as $player) {
echo '<img title="'.$player.'" src="https://minotar.net/avatar/'.$player.'/32">';
}
} else {
return 'empty';
}
} else {
return 'empty';
}
}
You should do this;
print_r($playersList);
just after you set it to see what it actually is. My guess is that you are not getting what you suspect from the getURL call.
Add one more equals sign to take type comparison into account as well
if ($playerList !== '')
try this
if (isset($playersList) && is_array($playersList) && !empty($playersList)) {
// convert list of comma-separated names into array
$players = explode(',', $playersList->players);
foreach ($players as $player) {
echo '<img title="'.$player.'" src="https://minotar.net/avatar/'.$player.'/32">';
}
} else {
return 'empty';
}
If I had an array such as:
testarray = array('foo'=>34, 'bar'=>array(1, 2, 3));
How would I go about converting a string such as testarray[bar][0] to find the value its describing?
Well, you can do something like this (Not the prettiest, but far safer than eval)...:
$string = "testarray[bar][0]";
$variableBlock = '[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*';
$regex = '/^('.$variableBlock.')((\[\w+\])*)$/';
if (preg_match($regex, $string, $match)) {
$variableName = $match[1]; // "testarray"
if (!isset($$variableName)) {
//Error, the variable does not exist
return null;
} else {
$array = $$variableName;
if (preg_match_all('/\[(\w+)\]/', $match[2], $matches)) {
foreach ($matches[1] as $match) {
if (!is_array($array)) {
$array = null;
break;
}
$array = isset($array[$match]) ? $array[$match] : null;
}
}
return $array;
}
} else {
//error, not in correct format
}
You could use PHP's eval function.
http://php.net/manual/en/function.eval.php
However, make absolutely sure the input is sanitized!
Cheers
I've been trying to think of a way to dynamically return property values for a class using __call instead of creating a slew of functions whose only purpose would be to return those values. The idea I have is to be able to request ( for example ) $this->fetch_PersonFirstName() and have the class check if $this->person["first_name"] is set and return the value. Another example would be calling $this->fetch_BookGenreTitle() and have the class return the value of $this->book["genre"]["title"]. I know something like this would have to do a bit of checking in order for it to automatically determine that, for example, since $this->book["genre_title"] doesn't exist, then it should check for $this->book["genre"]["title"].
So far I've come up with code that ( for some reason ) works for returning the values of an array ( such as my person example ) but my problem quickly develops when I try to return the values of a multidimensional array ( such as with my above book example ). Bare in mind, I'm still trying to think of a way for the __call method to check for the existence of one, and if it doesn't exist, then the other.
Please, throw me a line here. I've been banging my head against the wall trying to figure this out and it's killing me.
<?php
class Test
{
protected $person;
protected $book;
public function __construct()
{
$this->person["first_name"] = "John Smith";
$this->book["genre"]["title"] = "Suspense";
}
public function __call($method, $args)
{
$args = implode(", ", $args);
if (preg_match("/^fetch_([A-Z]{1,}[a-z]{1,})(.*)?/", $method, $match))
{
print_r($match);
echo "<br><br>";
$property = strtolower($match[1]);
$indexes = $match[2];
if (property_exists("Test", $property))
{
if ($indexes)
{
$indexes = preg_split("/(?<=[a-z])(?=[A-Z])/", $indexes);
$num_indexes = count($indexes);
$count_indexes = 1;
for ($count=0; $count<$num_indexes; $count++)
{
$record = strtolower($indexes[$count]);
$index .= $record;
$array .= "{$record}";
$var_index = $index;
$var_array = $array;
echo $var_index." {$count}<br>";
echo $var_array." {$count}<br>";
//print_r($this->{$property}{$var_array});
if ($count_indexes == $num_indexes)
{
if (isset($this->{$property}{$var_index}))
{
return $this->{$property}{$var_index};
}
else
{
return $this->{$property}{$var_array};
}
}
else
{
$index .= "_";
}
$count_indexes++;
}
echo "<br><br>";
}
else
{
return $this->{$property};
}
}
}
}
}
?>
<?php
$test = new Test();
echo $test->fetch_PersonFirstName();
echo "<br><br>";
echo $test->fetch_BookGenreTitle();
?>
Thanks again folks. I think I finally have my solution, which works for multidimensional arrays or any depth and accounts for determining whether a property is, for example $this->book["genre_title"] or $this->book["genre"]["title"] :)
I'm posting the code below as someone else may randomly find it useful in the future
<?php
class Test
{
protected $person;
protected $book;
public function __construct()
{
$this->person["first_name"] = "John Smith";
$this->book["genre"]["title"] = "Suspense";
}
public function __get($var)
{
if (preg_match_all("/([A-Z][A-Z0-9]*(?=$|[A-Z][a-z0-9])|[A-Za-z][a-z0-9]+)/", $var, $matches))
{
$matches = $matches[1];
$property = strtolower($matches[0]);
if (property_exists($this, $property))
{
unset($matches[0]);
$matches = array_values($matches);
$num_matches = count($matches);
$var = &$this->{$property};
if (!$num_matches)
{
return $var;
}
else
{
foreach($matches as &$match)
{
$match = strtolower($match);
$index .= $match;
if ($probe = $this->iterateArray($var, $index))
{
$var = $probe;
unset($index);
}
elseif ($probe = $this->iterateArray($var, $index))
{
$var = $probe;
}
else
{
$index .= "_";
}
}
return $var;
}
}
}
}
public function iterateArray($var, $index)
{
if (array_key_exists($index, $var))
{
return $var[$index];
}
else
{
return false;
}
}
}
?>
<?php
$test = new Test();
echo $test->PersonFirstName;
echo "<br><br>";
echo $test->BookGenreTitle;
?>
There's more than likely some ways to improve/streamline the code, in which case anyone wanting to do so is more than welcome to post an improved version.
Given "BookGenreTitle" :
Use some sort of regex to separate "Book", "Genre", and "Title"
property_exists($this, "Book")
array_key_exists("genre", $this->book)
If key exists, return $this->book["genre"]
If key doesn't exist, array_key_exists("genre_title", $this->book)
If key exists, return $this->book["genre_title"]
If key doesn't exist, array_key_exists("genre", $this->book) && array_key_exists("title", $this->book["genre"])
Keep going
There's probably a way to use a loop or some sort of recursion instead of hard-coding the maximum depth, but I won't get into that now...
Oh, and as the other poster said, what you want is property overloading (__get and __set).
You need to take a look at property overloading, not method overloading as you've already figured out in the question's title yourself.