equivalent of JavaScript findIndex() in PHP

Question

This is how I am retrieving items from an array in JavaScript, it works fine:

function getLibItemByName(name){
    var index = json.library.findIndex(p => p.name == name);
    return json.library[index];
}

my array is like:

[
    {
        "name": "item1"
    },
    {
        "name": "item2"
    },
    ...
]

Now I am wondering how I can do the same in PHP?

Update : I came up with this that is working for now

function getLibItemByName($name){
    global $json;
    foreach($json['library'] as $key => $val){
        if($name === $val['name']){
            return $json['library'][$key];
        }
    }
    return false;
}

Answer 1

Use array_search() function, it works like this:

array_search(what_to_search,array_variable,true/false);

FALSE is default parameter. If this parameter is set to TRUE, then this function will search for identical elements in the array. When set to true, the number 5 is not the same as the string 5.

Here is the given example:

$a=array("a"=>"5","b"=>5,"c"=>"5");
echo array_search(5,$a,true);

Returns the key of a value if it is found in the array, and FALSE otherwise. If the value is found in the array more than once, the first matching key is returned.

Answer 2

In PHP, there is an array function array_serach() which matches value and returns of its key. It takes search value as an first argument and array as an second argument.

    $array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');

    $key = array_search('green', $array); // $key = 2;
    $key = array_search('red', $array);   // $key = 1;

Answer 3

I'll offer two suggestions.

1. A few adjustments on your foreach loop method.
2. A combination of array_search() and array_column()

A few explanations via inline comments.

Code: ( Demo )

function getLibItemByName($array,$name){  // avoid global, assign $array as parameter
    foreach($array['library'] as $key => $row){
        if($name === $row['name']){
            return $row;  // return the whole subarray (this is a simpler expression)
        }
    }
    return false;
}

// logically rename json to array
$array=[
    'library'=>
        [
            ['name'=>'Alan','age'=>5],
            ['name'=>'Bert','age'=>6],
            ['name'=>'Chad','age'=>7],
            ['name'=>'Doug','age'=>8],
            ['name'=>'Eddy','age'=>9],
            ['name'=>'Fred','age'=>10]
        ]
];

var_export(getLibItemByName($array,'Chad'));
echo "\n---\n";
var_export(getLibItemByName($array,'Greg'));

echo "\n---\n";

if(($index=array_search('Eddy',array_column($array['library'],'name')))!==false){
    var_export($array['library'][$index]);
}else{
    echo 'No match';
}

Output:

array (
  'name' => 'Chad',
  'age' => 7,
)
---
false
---
array (
  'name' => 'Eddy',
  'age' => 9,
)

Answer 4

current(array_filter($array, function($e){return $e->property_you_want_to_lookup == 'value you are looking for';}));