I'm doing a small PHP framework, I'm having issues passing the variables to the view...Here is what I do:
// $vars is : array("foo1" => "bar1", "foo2" => "bar2")
if(is_array($vars))
{
foreach ($vars as $key => $value)
{
$key = $value;
}
}
//add the view.
include($path);
}
So I'll like in my view access to $foo1 and $foo2, but they are NULL. How is the way to do it?
All you're doing is setting the value of the var $key to what it already is...
What I assume is your goal is getting the variables from the array into their own variable.
If that's the case then change
$key = $value;
Into
$$key = $value;
By using $$ your setting new variables with the name of the $key
// $vars is : array("foo1" => "bar1", "foo2" => "bar2")
foreach ($vars as $key => $value){
$$key = $value;
}
// results in:
// $foo1 = "bar1"
// $foo2 = "bar2"
Related
Im using a function to update $_SESSION data
function session_values($key, $value)
{
if(empty($_SESSION[$key])
{
$_SESSION[$key] = $value;
}else if($_SESSION[$key] != $value)
{
$_SESSION[$key] = $value;
};
};
session_values($key, $value);
question is, how to use this function, add a $_SESSION value equal to
$_SESSION['thispage']['signup']['name'] = 'Bob';
for example.
Like this:
$key = 'thispage';
$value = ['signup' => ['name' => 'Bob']];
session_values($key, $value);
This should have the same effect as
$_SESSION['thispage']['signup']['name'] = 'Bob';
EDIT: ten months later, I'm still back to this.. still can't figure it out :(
I can search for a string in an array no problem; this works:
if (in_array('animals', $value[tags])){
echo "yes";
}
But how can I check for a variable in the array? This doesn't seem to work:
$page_tag = 'animals';
if (in_array($page_tag, $value[tags])){
echo "yes";
}
I'm guessing I'm missing some simple syntax doodad?
The array is massive, so I'll try and show a sample of it. It is stored on a separate php file and "included" in other places.
global $GAMES_REPOSITORY;
$GAMES_REPOSITORY = array (
"Kitten Maker" => array (
"num" => "161",
"alt" => "Kitten Maker animal game",
"title" => "Create the kitten or cub of your dreams!",
"tags" => array ("animals", "feline", "cats", "mega hits"),
),
}
Here's a larger part of the code, to put into context. It pulls from the array of ~400 games, and pulls the ones with a specific tag:
function array_subset($arr) {
$newArray = array();
foreach($arr as $key => $value) {
if (in_array($page_tag, $value["tags"])){
if(is_array($value)) $newArray[$key] = array_copy($value);
else if(is_object($value)) $newArray[$key] = clone $value;
else $newArray[$key] = $value;
}
}
return $newArray;
}
function array_copy($arr) {
$newArray = array();
foreach($arr as $key => $value) {
if(is_array($value)) $newArray[$key] = array_copy($value);
else if(is_object($value)) $newArray[$key] = clone $value;
else $newArray[$key] = $value;
}
return $newArray;
}
$games_list = array();
$games_list = array_subset($GAMES_REPOSITORY);
$games_list = array_reverse($games_list);
Oh, an interesting hint. Elsewhere it DOES work using $_GET:
if (in_array($_GET[tagged], $value[tags])){
The in_array() function can check variables, so it is likely that your problem comes from somewhere else. Verify that you've defined your constant tags correctly. If it's not defined, it might not work depending on your PHP version. Some versions just assume that you wanted to write the string tags instead of a constant named tags.
Your code works. Here's a full example that I've tested that works well:
<?php
const tags = "tags";
$page_tag = 'animals';
$value = array('tags' => array("fruits", "animals"));
if (in_array($page_tag, $value[tags])){
echo "yes";
}
You have an array of arrays, so in_array() wont work as you have written it as that test for existence in an array, not a subarray. You may as well just loop through your arrays like this:
foreach($GAMES_REPOSITORY as $name =>$info) {
if(in_array($page_tag, $info['tags']))
{ whatever }
}
If that is not fast enough you will have to cache your tags by looping ahead of time and creating an index of tags.
I finally got it to work! I don't entirely understand why, but I had to feed the variable into the function directly. For some reason it wouldn't pull the variable from the parent function. But now it works and it even takes two dynamic variables:
function array_subset2($arr, $tag1, $tag2) {
$newArray = array();
foreach($arr as $key => $value) {
if (in_array($tag1, $value['tags'])){
if (in_array($tag2, $value['tags'])){
if(is_array($value)) $newArray[$key] = array_copy2($value);
else if(is_object($value)) $newArray[$key] = clone $value;
else $newArray[$key] = $value;
}
}
}
return $newArray;
}
function array_copy2($arr) {
$newArray = array();
foreach($arr as $key => $value) {
if(is_array($value)) $newArray[$key] = array_copy2($value);
else if(is_object($value)) $newArray[$key] = clone $value;
else $newArray[$key] = $value;
}
return $newArray;
}
$games_list = array();
$games_list = array_subset2($GAMES_REPOSITORY, $page_tag, $featured_secondary_tag);
How can i know the variables ?
foreach($tree as $key => $value){
if (in_array($value['name'], $arr_folders)) {
${'id_'.$value['name']} = $value['id'];
}
//how to know variables?
$id_???
Currently I know the $value['name'] ie. it may be one,two, three, etc. but how to use them
echo $id_one;
I wanted to know here to split them in an array. So i can use
print_r($vars); which would result $id_one, $id_two, etc..
Something like this?
<?php
$array = [];
foreach($tree as $key => $value){
if (in_array($value['name'], $arr_folders)) {
$array[] = $value['id'];
}
}
print_r($array);
You can find variables by code:
foreach (get_defined_vars() as $var_name => $var_value) {
if(strpos($var_name, 'id_') ===0 ){
//it's your variable
}
}
But store variable in local scope look wrong.
May be better store to an other array:
$arIds = array();
foreach($tree as $key => $value){
if (in_array($value['name'], $arr_folders)) {
$arIds['id_'.$value['name']] = $value['id'];
}
}
Is it possible to set property values of an object using a foreach loop?
I mean something equivalent to:
foreach($array as $key=>$value) {
$array[$key] = get_new_value();
}
EDIT: My example code did nothing, as #YonatanNir and #gandra404 pointed out, so I changed it a little bit so it reflects what I meant
You can loop on an array containing properties names and values to set.
For instance, an object which has properties "$var1", "$var2", and "$var3", you can set them this way :
$propertiesToSet = array("var1" => "test value 1",
"var2" => "test value 2",
"var3" => "test value 3");
$myObject = new MyClass();
foreach($propertiesToSet as $property => $value) {
// same as $myObject->var1 = "test value 1";
$myObject->$property = $value;
}
Would this example help at all?
$object = new stdClass;
$object->prop1 = 1;
$object->prop2 = 2;
foreach ($object as $prop=>$value) {
$object->$prop = $object->$prop +1;
}
print_r($object);
This should output:
stdClass Object
(
[prop1] => 2
[prop2] => 3
)
Also, you can do
$object = new stdClass;
$object->prop1 = 1;
$object->prop2 = 2;
foreach ($object as $prop=>&$value) {
$value = $value + 1;
}
print_r($object);
You can implement Iterator interface and loop through the array of objects:
foreach ($objects as $object) {
$object->your_property = get_new_value();
}
Hacked away at this for a few hours and this is what i finally used. Note the parameters passed by reference in two places. One when you enter the method and the other in the foreach loop.
private function encryptIdsFromData(&$data){
if($data == null)
return;
foreach($data as &$item){
if(isset($item["id"]))
$item["id"] = $this->encrypt($item["id"]);
if(is_array($item))
$this->encryptIdsFromData($item);
}
}
$arr = array ('name'=>'bunt','game'=>'battlefield','fame'=>'hero');
foreach ($arr as $key=>$val){
$val = ucfirst($val);
}
var_dump($arr);
// result would be
// 'name' => 'Bunt', 'game' => 'Battlefield', 'fame' => 'Hero'
I am missing something here.... How to accomplish this ?
Use array_map()
$new_array = array_map('ucfirst', $arr);
See it in action
$val is just a temporary variable in each iteration. To update the value of each key you need to pass it as a reference. Do this.
foreach ($arr as $key => &$val) {
$val = ucfirst($val);
}
Notice the & following $val.
Here's some documentation on references in PHP.
foreach ($arr as $key=>&$val){
$val = ucfirst($val);
}
Put an & sign before $val . that will make it reference the variable instead of assigning the value.
Why not just use the key to access the array?
<?php
$arr = array('name' => 'bunt', 'game' => 'battlefield');
foreach ($arr as $key => $val) {
$arr[$key] = ucfirst($val);
}
var_dump($arr);