This question already has answers here:
How does true/false work in PHP?
(6 answers)
Closed 2 years ago.
I'm trying to find and output the value from a specific key.
$name = 'G';
$ids = array();
foreach($arrayChart as $key){
$foundAtPosition = strpos($key['Name'], $name);
if ($foundAtPosition === false ||
$foundAtPosition > 0) {
continue;
}
$ids[] = $key['ID'];
}
echo join(',', $ids) . "\n";
Here is the array
$arrayChart = array(
array(
"Name" => "Mike G",
"ID" => "0001234",
"Hours" => 38
),
array(
"Name" => "Mike L",
"ID" => "0005678",
"Hours" => 42
)
array(
"Name" => "John G",
"ID" => "0003615",
"Hours" => 42
)
);
This code above was provided by #zedfoxus
He helped me with a previous problem.
I want to find the ID number from the key value ID by using the last name letter "G" from key Name.
I want to output them in the same line. The problem with the above function is that it doesn't print anything.
Please see the answer below.
<?php
$arrayChart = array(
array(
"Name" => "Mike G",
"ID" => "0001234",
"Hours" => 38
),
array(
"Name" => "Mike L",
"ID" => "0005678",
"Hours" => 42
),
array(
"Name" => "John G",
"ID" => "0003615",
"Hours" => 42
)
);
$name = 'G';
$ids = array();
foreach($arrayChart as $key){
$foundAtPosition = strpos($key['Name'], $name);
if ($foundAtPosition) {
$ids[] = $key['ID'];
}
}
echo join(',', $ids) . "\n";
?>
Related
This question already has answers here:
Reference: What is variable scope, which variables are accessible from where and what are "undefined variable" errors?
(3 answers)
Closed 1 year ago.
There are way to do this in JavaScript, but in PHP they don't seem to work:
$myArray = array(
array(
"name" => "John Doe",
"occupation" => "streamer"
),
array(
"name" => "Jena Doe",
"occupation" => "delivery services"
)
);
$newItem = array(
"name" => "John Doe",
"occupation" => "delivery services"
);
// now check if the name already exists
// to prevent from adding a duplicate clone of John Doe
if (!array_map(function($i){ if ($i['name'] === $newItem['name']) return true; else return false; }, $myArray)) {
$myArray[] = $newItem;
}
Why am I getting Undefined variable: $newItem and how can I do this?
You could use a simple test using in_array to see if the new array contains the duplicate name before adding?
$src = array(
array(
"name" => "John Doe",
"occupation" => "streamer"
),
array(
"name" => "Jena Doe",
"occupation" => "delivery services"
)
);
$new=array(
"name" => "John Doe",
"occupation" => "delivery services"
);
if( !in_array( $new['name'], array_values( array_column( $src, 'name' ) ) ) ){
$src[]=$new;
}
I need to remove Jackie Jackson from this array, I tried unset(I do not want to use key), array_diff, array_search. Nothing is working for me.
$employeeList= array(
array(
"ID" => "ID",
"Name" => "Name",
"Surname" => "Surname",
),
array(
"ID" => 1,
"Name" => "John",
"Surname" => "Smith",
),
array(
"ID" => 2,
"Name" => "Jackie",
"Surname" => "Jackson",
),
array(
"ID" => 3,
"Name" => "Chris",
"Surname" => "Jones",
),
array(
"ID" =>4,
"Name" => "Amanda",
"Surname" => "Cullen",
),
array(
"ID" =>5,
"Name" => "Jeremy",
"Surname" => "Goodwin",
),
);
if you want to unset you can use the id of Jackie Jackson to match his key.
$id = 2;
unset($employeeList[array_search($id,array_column($employeeList, "ID"))]);
Have fun :)
Array filter to check if the name and surname match. The string must contain name and surname separated by a space in this case so we can "explode" and pick up each individually. If name or surname do not exist in the "name_to_exclude" the function will simply return the original array.
$name_to_exclude = "Jackie Jackson";
$exclude = explode(' ', $name_to_exclude);
$employeeList = array_filter($employeeList, function($val) use ($exclude) {
if(array_key_exists(0, $exclude) && array_key_exists(1, $exclude)) {
return $val['Name'] != $exclude[0] && $val['Surname'] != $exclude[1];
}
return true;
});
I have the following 2D array and I would like to get the key of the smalest value in the [0] column if done is equal to no
$graph= array(
"CityA" => array(
"0" => "1",
"1" => "CityC",
"done" => "no",
),
"CityB" => array(
"0" => "4",
"1" => "CityA",
"done" => "no",
),
"CityC" => array(
"0" => "5",
"1" => "CityA",
"done" => "no",
),
);
Try this,
$arr = array_map(function($v){return $v[0];}, $graph);
$key = array_keys($arr, min($arr));
Here you go.
$tes = min( array_column( $graph, 0 ) );
$key = array_search( $tes, array_column( $graph, 0 ) );
$array_keys = array_keys($graph);
echo $array_keys[$key];
You should perform all of your checks in a single pass through your array.
My snippet will provide the first qualifying (contains the lowest [0] value AND has a done value of no) row's key.
Code: (Demo)
$graph = [
"CityB" => ["0" => "1", "1" => "CityA", "done" => "no"],
"CityA" => ["0" => "1", "1" => "CityC", "done" => "no"],
"CityD" => ["0" => "1", "1" => "CityD", "done" => "yes"],
"CityC" => ["0" => "5", "1" => "CityA", "done" => "no"]
];
$result = [];
foreach ($graph as $key => $row) {
if ($row['done'] === 'no' && (!isset($result[$key]) || $row[0] < $result[$key])) {
$result[$key] = $row[0];
}
}
echo key($result) ?? 'No "done => no" rows';
Output:
CityB
For example a multidimensional array like an example below
$arr = array(
[H1] => array(
"name" => "A"
"title" => "T1"
)
[H2] => array(
"name" => "B"
"title" => "B1"
)
)
Let's say I would like to search name which equals to A in $arr and if it's matched, the searching should return the key which is H1
How can I do that in php ?
I tried array_keys($arr, "A") but it returns me with an array instead of the key.
This may help -
$arr = array(
'H1' => array(
"name" => "A",
"title" => "T1",
),
'H2' => array(
"name" => "B",
"title" => "B1",
)
);
// Generate a new array with 'keys' and values in 'name'
$new = array_combine(array_keys($arr), array_column($arr, 'name'));
// Search in that new array
$search = array_search('A', $new);
var_dump($search);
Output
string(2) "H1"
Demo
Another simple way would be -
$serach= false;
foreach($arr as $key => $val) {
if($val['name'] == 'A') {
$search= $key;
break;
}
}
var_dump($search);
Suppose i have a array like this :
Array(
'1' => Array(
"ID" => 1,
"Name" => "name 1"
),
'2' => Array (
Array(
"ID" => 2,
"Name" => "name 2"
)
),
'3' => Array(
Array(
Array(
Array(
"ID" => 3,
"Name" => "name3"
)
)
),
'4' => Array (
Array {
"ID" => 4,
"Name" => "name 4"
),
Array(
"ID" => 5,
"Name" => "name 5"
),
Array(
"ID" => 6,
"Name" => "name 6"
)
);
number of sub-arrays is not ordered it may be 3, 4 or 5 etc...
and i wanted to get :
Array(
Array( "ID" => 1, "Name" => "name 1"),
Array( "ID" => 2, "Name" => "name 2"),
Array( "ID" => 3, "Name" => "name 3"),
Array( "ID" => 4, "Name" => "name 4"),
Array( "ID" => 5, "Name" => "name 5"),
Array( "ID" => 6, "Name" => "name 6"));
Is there an easy way to do this ?
EDIT :
Edited the above array to add :
'4' => Array (
Array {
"ID" => 4,
"Name" => "name 4"
),
Array(
"ID" => 5,
"Name" => "name 5"
),
Array(
"ID" => 6,
"Name" => "name 6"
)
);
which aren't nested but i still want them to be in my final array.
Thanks.
//Assuming your data is in $in
$out=array();
foreach($in as $k=>$v) {
while ((is_array($v)) && (isset($v[0]))) $v=$v[0];
//See below for next line
$out[]=$v;
}
print_r($out);
With the marked line being either $out[$k]=$v; or $out[]=$v; depending on wether you want to keep the 1st-level keys. In your desired output you do not ,so use the shown version
Edit
With you changed input array, you need to do something like
function addtoarray($inarray, &$outarray) {
foreach ($inarray as $i) {
if (!is_array($i)) continue;
if (isset($i['ID'])) $outarray[]=$i;
else addtoarray($i,$outarray);
}
}
$out=array();
addtoarray($in,$out);
print_r($out);
This was tested against your new input data
You could recurse through the array and check for the ID field.
function combine_array(array $src, array &$dest)
{
if( isset( $src['ID'] ) ) {
$dest[] = $src;
return;
}
foreach( $sub in $src ) {
combine_array( $sub, $dest );
}
}
Just wrote this off the top of my head, no testing, so it might have a few problems. But that's the basic idea.
This may work for you, assuming $array is the variable and php 5.3
//process
$array = array_map(function($block) {
$return = '';
foreach ($block as $sub) {
if (true === isset($sub['ID']) {
$return = $block;
break;
}
}
return $block;
}, $array);
array_filter($array); //remove empty elements
Wrote up a quick recursive function. You'll need to write any appropriate error handling and check the logic, since a discrepancy in your data could easily turn this into an infinite loop:
$output = array();
foreach ( $data as $d ) {
$output[] = loop_data( $d );
}
function loop_data( $data ) {
// Check if this is the right array
if( ! array_key_exists( "ID", $data ) ) {
// Go deeper
$data = loop_data( $data[0] );
}
return $data;
}