PHP assessment (refactoring and optimisation)

store.php

<?php
function store($variable){
    $insert = "INSERT INTO `".$variable['table']."`(";
    foreach ($variable as $key => $value) {
        if(trim($key) != 'table'){
            $insert = $insert.''.$key.',';
        }
    }
    $insert = substr($insert,0,-1);
    $insert = $insert.") VALUES(";
    foreach ($variable as $key => $value) {
        if(trim($key) != 'table'){
            if(trim(gettype($value)) == 'string'){
                $insert = $insert.'\''.$value.'\',';
            }else{
                $insert = $insert.''.$value.',';
            }
        }
    }
    $insert = substr($insert,0,-1);
    $insert = $insert.')';
    foreach ($variable as $key => $value) {
        if(trim($key) != 'table'){
            if(trim(gettype($value)) == 'string'&&strlen($value) < 512){
                $variable[$key] = $key.' TEXT(512),
';
            }elseif(trim(gettype($value)) == 'string'&&strlen($value) > 512&&strlen($value) <= 1024){
                $variable[$key] = $key.' TEXT(1024),
';
            }elseif(trim(gettype($value)) == 'string'&&strlen($value) > 1024&&strlen($value) <= 2048){
                $variable[$key] = $key.' TEXT(2048),
';
            }elseif(trim(gettype($value)) == 'string'&&strlen($value) > 2048&&strlen($value) <= 4096){
                $variable[$key] = $key.' TEXT(4096),
';
            }elseif(trim(gettype($value)) == 'string'&&strlen($value) > 4096){
                $variable[$key] = $key.' TEXT(65535),
';
            }
            if(gettype($value) == 'integer'){
                $variable[$key] = $key.' INT(128),
';
            }
            if(gettype($value) == 'double'||gettype($value) == 'float'){
                $variable[$key] = $key.' FLOAT(53),
';
            }
        }
    };
    $table = "
        CREATE TABLE ".$variable['table']."(
        id INT(20) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
        ";
            foreach ($variable as $key => $value) {
                if(trim($key) != 'table'){
                    $table = $table.''.$value;
                }
            };
            $table = substr($table,0,-3);
            $table = $table.'
        )';
    return array(
       'insert' => $insert,
       'table' => $table
    );
};