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Description

Emulate PHP native ctype_digit() function for when the ctype extension would be disabled *sigh*.

Only emulates the behaviour for when the input is a string, does not handle integer input as ascii value.

Usage

$bool = ctype_digit( $string );

Parameters

$string

( string ) required – String input to validate.

Returns

bool

Source

File name: wordpress-seo/inc/wpseo-functions.php
Lines:

  function ctype_digit( $string ) {
    $return = false;
    if ( ( is_string( $string ) && $string !== '' ) && preg_match( '`^\d+$`', $string ) === 1 ) {
      $return = true;
    }

    return $return;
  }
 

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