Filter 1-D PHP array with custom filters.

apply_filter_function.php

/**
     * Author: @mkhizeryounas
     * @array : 1-D Array
     * @rules : 
     * {
     *      "filter" : [
     *           {
     *               "key" : "product_id",
     *               "value" : "10593",
     *               "op" : "<"
     *           }
     *       ]
     *   } 
*/

function sd_filter($array, $rules=[]) {
    if(!is_array($rules)) $rules = [];
    $resArr = [];
    foreach($array as $key => $val) {
        $check = true;
        foreach($val as $dataKey => $dataVal) {
            $onceWrong = false;
            foreach($rules as $ruleKey => $ruleVal) {
                if(
                    !isset($ruleVal['key']) ||
                    !isset($ruleVal['value']) ||
                    !isset($ruleVal['op'])
                ) continue;
                if($dataKey === $ruleVal['key']) {

                    if($ruleVal['op'] === "==") { // equal op
                        if($dataVal == $ruleVal['value']) {
                            $check = true;
                            continue;
                        }
                        else {
                            $onceWrong = true;
                            $check = false;
                            break;
                        }
                    }
                    else if($ruleVal['op'] === "!=") { // not equal op
                        if($dataVal != $ruleVal['value']) {
                            $check = true;
                            continue;
                        }
                        else {
                            $onceWrong = true;
                            $check = false;
                            break;
                        }
                    }
                    else if($ruleVal['op'] === ">") { // Greater than
                        if(floatval($dataVal) > floatval($ruleVal['value'])) {
                            $check = true;
                            continue;
                        }
                        else {
                            $onceWrong = true;
                            $check = false;
                            break;
                        }
                    }
                    else if($ruleVal['op'] === "<") { // less than
                        if(floatval($dataVal) < floatval($ruleVal['value'])) {
                            $check = true;
                            continue;
                        }
                        else {
                            $onceWrong = true;
                            $check = false;
                            break;
                        }
                    }
                    else if($ruleVal['op'] === "<=") { // less than equal
                        if(floatval($dataVal) <= floatval($ruleVal['value'])) {
                            $check = true;
                            continue;
                        }
                        else {
                            $onceWrong = true;
                            $check = false;
                            break;
                        }
                    }
                    else if($ruleVal['op'] === ">=") { // greater than equal
                        if(floatval($dataVal) >= floatval($ruleVal['value'])) {
                            $check = true;
                            continue;
                        }
                        else {
                            $onceWrong = true;
                            $check = false;
                            break;
                        }
                    }
                }
            }   
            if($onceWrong) break;
        }
        if($check) {
            array_push($resArr, $val);
        }
    }
    return $resArr;
}