ILIAS  release_5-2 Revision v5.2.25-18-g3f80b82851
Integer.php
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1 <?php
2 
11 {
12 
17  protected $negative = true;
18 
23  protected $zero = true;
24 
29  protected $positive = true;
30 
36  public function __construct($negative = true, $zero = true, $positive = true)
37  {
38  $this->negative = $negative;
39  $this->zero = $zero;
40  $this->positive = $positive;
41  }
42 
49  public function validate($integer, $config, $context)
50  {
51  $integer = $this->parseCDATA($integer);
52  if ($integer === '') {
53  return false;
54  }
55 
56  // we could possibly simply typecast it to integer, but there are
57  // certain fringe cases that must not return an integer.
58 
59  // clip leading sign
60  if ($this->negative && $integer[0] === '-') {
61  $digits = substr($integer, 1);
62  if ($digits === '0') {
63  $integer = '0';
64  } // rm minus sign for zero
65  } elseif ($this->positive && $integer[0] === '+') {
66  $digits = $integer = substr($integer, 1); // rm unnecessary plus
67  } else {
68  $digits = $integer;
69  }
70 
71  // test if it's numeric
72  if (!ctype_digit($digits)) {
73  return false;
74  }
75 
76  // perform scope tests
77  if (!$this->zero && $integer == 0) {
78  return false;
79  }
80  if (!$this->positive && $integer > 0) {
81  return false;
82  }
83  if (!$this->negative && $integer < 0) {
84  return false;
85  }
86 
87  return $integer;
88  }
89 }
90 
91 // vim: et sw=4 sts=4
Base class for all validating attribute definitions.
Definition: AttrDef.php:13
$negative
Whether or not negative values are allowed.
Definition: Integer.php:17
__construct($negative=true, $zero=true, $positive=true)
Definition: Integer.php:36
validate($integer, $config, $context)
Definition: Integer.php:49
parseCDATA($string)
Convenience method that parses a string as if it were CDATA.
Definition: AttrDef.php:60
$positive
Whether or not positive values are allowed.
Definition: Integer.php:29
$zero
Whether or not zero is allowed.
Definition: Integer.php:23
Validates an integer.
Definition: Integer.php:10