循环数组并提取所有有效的电子邮件地址

Question

I allow a CSV to be uploaded and then I convert it into an array:

$csvAsArray = array_map('str_getcsv', file($results['full_path']));

The above code will produce something like this:

array(127) {
  [0]=>
  array(3) {
    [0]=>
    string(4) "Name"
    [1]=>
    string(5) "Email"
    [2]=>
    string(9) "Something"
  }
  [1]=>
  array(3) {
    [0]=>
    string(3) "dfg"
    [1]=>
    string(24) "[e-mail]"
    [2]=>
    string(2) "34"
  }
  [2]=>
  array(3) {
    [0]=>
    string(3) "dfg"
    [1]=>
    string(23) "[e-mail]"
    [2]=>
    string(2) "34"
  }

I can't guarantee the structure of the CSV which is why I can't look up a particular column. So I can loop the array e.g.

foreach($csvAsArray as $csvData) {
    var_dump($csvData);
}

How could I extract all the valid email addresses from this array?

Answer 1

Loop through each value and check if it is a valid email address:

$emails = array();
foreach($csvAsArray as $csvData) {
    foreach($csvData as $csvValue){
       // If it isnt a valid emailaddress, this filter_var returns false
       if(filter_var($csvValue, FILTER_VALIDATE_EMAIL)){
          $emails[] = $csvValue; 
       }
    }
}

var_dump($emails);