How to create an array dynamically in PHP?

Question

I need to create an array in the format:

//$arr = ['id' => 1, 'razao_social' => 'Teste'] // saida esperada
// iteração
foreach($prestadores as $prestador){
    // logica separando apenas alguns prestadores
    if ($cont($outro_sql) > 1) {
        $dados = array_add($dados,'id',$prestador->id);
        $dados = array_add($dados,'razao_social',$prestador->razao_social);
    }
}

So far so good, but the result of the array dd($dados) has as output the array, but only with the last record.

I need the array to be mounted with all records.

See, I know $provider is already an array, but I need to build a BD access logic by accessing other tables, where only a few records will compose this new array.

Answer 1

I suggest learning the basics of the language before doing anything more complex.

Here you test a condition within a loop, and she won’t change, so either she’ll add everything, or she won’t add anything:

if ($cont($outro_sql) > 1) {

If the condition is fixed, it is the case to test outside the loop instead of repeating the test altogether. If it was to depend on the current record, you need to correct the logic. It may be that you are calling a variable function as well, then it would make some sense, but in view of the rest of the code I suggest analyzing if this is what you want. It seems strange to me the construction.

Already in this excerpt you are continuously overwriting the variable $dados:

    $dados = array_add($dados,'id',$prestador->id);
    $dados = array_add($dados,'razao_social',$prestador->razao_social);

Another thing is wanting to store result of array_add (it would be the case of array_push), which returns the last value. When using array_push usually do not need to do assignments.

Unless, of course, you’ve written a function array_add to return the array added on itself, but then really it would be suffered you determine how to make the "pair" of id and razao_social correct.

Probably (this is what we could understand according to the example in the code comment) would be the case to do something like this:

    $dados[] = array(
      'id' => $prestador->id,
      'razao_social' = $prestador->razao_social
    );

Or this:

    array_push( $dados,
       array( 'id' => $prestador->id, 'razao_social' => $prestador->razao_social )
    );

Or even this, to illustrate otherwise:

    $dados = array();

    $par = array();
    $par['id'] = $prestador->id;
    $par['razao_social'] = $prestador->razao_social;

    array_push( $dados, $par );

When you assign a value using empty index ([]), PHP adds an element at the end of array

I would suggest a more in-depth reading of the manual to understand the basic elements of language, and do little exercises until you master each concept:

http://php.net/manual/en/index.php