TwigExtensionFind.php

<?php

/**
 * @return array
 */
public function getFilters()
{
    return [
        new TwigFilter('find', [$this, 'array_find']),
        new TwigFilter('findIndex', [$this, 'array_find_index']),
    ];
}

/**
 * @return mixed|null The found value
 * 
 * @example:
 * {% set items = [{id:1, name:"one"}, {id:2, name:"two"}, {id:3, name:"three"}] %}
 * {{ items|find(i => i.name|length > 3)|json_encode }}
 */
public function array_find(array $array, callable $callback) {
    foreach ($array as $key => $value) {
        if (call_user_func($callback, $value, $key, $array) === true) return $value;
    }
    return null;
}

/**
 * @return int The found index, or -1
 */
public function array_find_index(array $array, callable $callback) {
    foreach ($array as $key => $value) {
        if (call_user_func($callback, $value, $key, $array) === true) return $key;
    }
    return -1;
}