PHP在字符串数组中查找子字符串

Question

I have the following array:

$historicalFullList = ['Fecha','H-kWH-Total','H-kWH-Pico','H-kWH-Resto','H-kWH-Valle','H-Acum-Pico','H-Acum-Resto','H-Acum-Valle','H-Fecha-Pico','H-Fecha-Resto','H-Fecha-Valle','H-kW-Pico','H-kW-Resto','H-kW-Valle','H-kVARH-Total','error','factMult','H-kW-Pico-C','H-kW-Resto-C','H-kW-Valle-C'];

I want to create a function to find if the substring 'Hk' exists in the array. (in this example array it should return TRUE)

For some reason the following code doesn't work. Is there a better way to do this?

function test($substring, $array){

    foreach ($array as $item){
        if (strpos($substring, $item)!== false){
            return true;
        }else{
            return false;
        }
    }
}

then called it..

if (test('H-k',$historicalFullList)){
    do stuff...
}

Answer 1

move your return false out of the foreach, else it will return false after the first comparison if it doesn't contain $substr .

function test($substring, $array){
    foreach ($array as $item){
        if (strpos($item,$substring)!== false){
            return true;
        }
    }
    return false;       
}

Also, swap the needle and the haystack for strpos.