How to check if a snippet of a string is in some array item

In your example, the strstr function did not work because it works to return an excerpt from a string contained in another, not for array .

So what to do?

If you need to check if within array $arrayIds there is a string that contains part of another, I suggest you combine array_map with the desired function. Then use in_ array to see if there is any true occurrence for this function.

An example, I want to know if "bola" exists in some part of the strings that are within array .

See:

 $produtos = array(
     'bola vermelha',
     'boneca Barbie',
     'caneca de ouro'
 );

 // Essa função será executada em cada item do array acima

 $verifica_string = function ($value)
 {
       return strpos($value, 'bola') !== false;
 };

 $lista_de_verificacoes = array_map($verifica_string, $produtos);

 var_dump(in_array(true, $lista_de_verificacoes , true)); // Retornará "true" se "bola" existir no array

You can optionally also use the preg_grep function followed by a count to see if any references have been found. I think you'll have to use less code in this case, but you'll have to use regular expression:

   // Temos que escapar os valores por causa do "."

   $refRegex = sprintf('/%s/', preg_quote('facebook.com'));

   if (count(preg_grep($refRegex, $arrayIds))) > 0) {
     // tem a string
   }

There is also a third way, which is to use the array_filter function. But in this case, when the situation is complex, like the one shown above, I always like to leave a function ready for this if it is necessary to reuse:

 function array_contains_value($neddle, array $array)
 {

     return (boolean) count(array_filter($array, function ($value) use($neddle)
     {
          return strpos($value, $neddle) !== false;
     }));
 }

In the above function I use the following functions:

• count - Count the values of array or a class that implements Countable

• array_filter - Removes the values of array according to the callback. It will be removed if you return FALSE

• strpos - Checks whether the string contains the specified snippet.

You could check this out:

 array_contains_value('facebook.com', ['www.facebook.com', 'www.google.com']);

A simpler example, I think it suits you.

$array = "facebook.com, google.com, twitter.com";
$ref = "http://m.facebook.com";
$arrayIds = explode(',', $array);

if (in_array($ref,$arrayIds)){
    echo 'Existe';
}else{
    echo 'Não existe';
}

Let's do the inverse, let's check if one of the array entries exists in the reference variable, so any reference that contains facebook.com will be valid

$array = "facebook.com, google.com, twitter.com";
$array = explode(trim(","),$array);
$ref = "http://m.facebook.com";
$flag = false;

foreach($array as $a){
if (preg_match("/{$a}/",$ref)){
       $flag = true;
   }
}

if($flag){
    echo 'sim';
}else{
    echo 'nao';
}