PHP checks to see if any array value is non-string or numeric?

Question

I have an array of values, and I would like to check that all values ​​are string or numeric. What is the most efficient way to do this?

I am currently just checking the strings, so I'm just doing if (array_filter($arr, 'is_string') === $arr)that which seems to work.

Answer 1

See: PHP is_string () and is_numeric () .

In combination with, array_filteryou can compare two arrays to make sure they are equal.

function isStringOrNumeric($in) {
// Return true if $in is either a string or numeric
   return is_string($in) || is_numeric($in);
}

class Test{}

$a = array( 'one', 2, 'three', new Test());
$b = array_filter($a, 'isStringOrNumeric');

if($b === $a)
    echo('Success!');
else
    echo('Fail!');

Answer 2

The following will be more effective:

function isStringNumberArray( $array){
  foreach( $array as $val){
    if( !is_string( $val) && !is_numeric( $val)){
      return false;
    }
  }
  return true;
}

This method:

• will not create a new array

Answer 3

, , . - :

function is_string_or_numeric($var)
{
    return is_string($var) || is_numeric($var);
}

:

if (array_filter($arr, 'is_string_or_numeric') === $arr)

Answer 4

PHP ctype, ctype_alpha() ctype_digit(), :

http://php.net/manual/en/book.ctype.php

Answer 5

, , " , " ( is_numeric(X), is_int(X) || is_string(X), ). , ( ) :

public function isValid(array $array) {
    $valid = TRUE;

    foreach ($arr as $value) {
        if (!is_int($value) && !is_string($value)) {
            $valid = FALSE;
            break;
        }
    }

    return $valid;
}

Answer 6

. , , .

, :

function isNumber($array_element) {
    return is_numeric($array_element);
}

and then call this test function using array_filter

if (array_filter($arr, 'is_number')  {
  // is a number code here.
}

Have you written the function 'is_string ()'? If not, it array_filter($arr, 'is_string')may not work as you think.

Answer 7

Two facts:

• foreach is faster than array_map () because it does not call a function at each iteration

• using === The operator is faster than is_int / is_string, for example:

  if ((int)$value === $value) echo "its an int";

  if ((string)$value === $value) echo "its a string";