回答編集履歴
4
修正
test
CHANGED
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@@ -62,7 +62,7 @@
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62
62
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63
63
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64
64
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65
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-
```
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65
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+
```HTML
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66
66
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67
67
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<form method="post"><input type="text" name="a" value="2017-02-14"><input type="submit" value="go"></form>
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68
68
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@@ -88,17 +88,17 @@
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88
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<form method="post"><input type="text" name="a" value="2017-01-40"><input type="submit" value="go"></form>
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90
90
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91
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-
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91
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+
```
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92
92
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93
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-
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93
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+
```PHP
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94
94
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95
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$pattern='#^(\d{4})([/-]?)(\d{2})\2(\d{2})$#';
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96
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97
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-
$a=filter_input(INPUT_POST,'a',FILTER_VALIDATE_REGEXP,[
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97
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+
$a=!isset($_POST["a"])?NULL:filter_input(INPUT_POST,'a',FILTER_VALIDATE_REGEXP,[
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98
98
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'options'=>[
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101
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-
'default'=>
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101
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+
'default'=> "",
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102
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'regexp'=> $pattern
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@@ -106,16 +106,18 @@
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106
106
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107
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]);
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108
108
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109
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-
if(
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109
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+
if(!is_null($a)){
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110
110
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111
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-
pr
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111
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+
if(preg_match($pattern,$a,$m) and checkdate($m[3],$m[4],$m[1])){
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112
112
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113
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-
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113
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+
print date("Y-m-d",strtotime($a))."<br>";
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114
114
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115
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+
}else{
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116
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115
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-
print "bad data!";
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117
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+
print "bad data!";
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118
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+
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119
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+
}
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116
120
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117
121
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}
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118
122
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119
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-
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120
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-
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121
123
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```
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3
おまけ
test
CHANGED
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@@ -49,3 +49,73 @@
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49
49
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}
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50
50
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51
51
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```
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52
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+
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53
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+
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54
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55
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+
# おまけ
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56
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+
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57
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+
POSTで受けたデータを前提とするのであれば、filter_inputで先に
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58
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+
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59
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+
バリデートするとか、日付形式の文字かどうかをcheckdate()するとか
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60
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+
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61
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+
色々やりようはあります
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62
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63
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+
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64
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65
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+
```PHP
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66
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+
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67
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+
<form method="post"><input type="text" name="a" value="2017-02-14"><input type="submit" value="go"></form>
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68
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69
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<form method="post"><input type="text" name="a" value="2017/02/15"><input type="submit" value="go"></form>
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70
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71
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<form method="post"><input type="text" name="a" value="20170216"><input type="submit" value="go"></form>
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72
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73
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<form method="post"><input type="text" name="a" value="2017/2/17"><input type="submit" value="go"></form>
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74
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75
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<form method="post"><input type="text" name="a" value="2017020180"><input type="submit" value="go"></form>
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76
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77
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<form method="post"><input type="text" name="a" value="2017/02-19"><input type="submit" value="go"></form>
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78
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79
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<form method="post"><input type="text" name="a" value="xxxx-yy-zz"><input type="submit" value="go"></form>
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80
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81
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<form method="post"><input type="text" name="a" value="0000-00-00"><input type="submit" value="go"></form>
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82
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83
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<form method="post"><input type="text" name="a" value="0001-01-01"><input type="submit" value="go"></form>
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84
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85
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<form method="post"><input type="text" name="a" value="9999-12-31"><input type="submit" value="go"></form>
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86
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+
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87
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<form method="post"><input type="text" name="a" value="2017-00-01"><input type="submit" value="go"></form>
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88
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+
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89
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<form method="post"><input type="text" name="a" value="2017-01-40"><input type="submit" value="go"></form>
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90
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91
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+
</form>
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92
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+
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93
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+
<?PHP
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94
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+
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95
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+
$pattern='#^(\d{4})([/-]?)(\d{2})\2(\d{2})$#';
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96
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+
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97
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+
$a=filter_input(INPUT_POST,'a',FILTER_VALIDATE_REGEXP,[
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98
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+
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99
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'options'=>[
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100
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101
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'default'=> NULL,
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102
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103
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'regexp'=> $pattern
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104
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105
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],
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106
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107
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]);
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108
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109
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if(preg_match($pattern,$a,$m) and checkdate($m[3],$m[4],$m[1])){
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110
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111
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print date("Y-m-d",strtotime($a))."<br>";
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112
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113
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}else{
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114
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115
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print "bad data!";
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116
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117
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}
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118
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+
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119
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120
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121
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+
```
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2
修正
test
CHANGED
|
@@ -30,7 +30,7 @@
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30
30
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31
31
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/* おかしなパターンを拾うのでいかに修正 */
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32
32
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33
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-
$pattern="#^\d{4}([/-]
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33
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+
$pattern="#^\d{4}([/-]?)\d{2}\\1\d{2}$#";
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34
34
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35
35
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foreach ($a as $val){
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36
36
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1
パターン修正
test
CHANGED
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@@ -20,13 +20,17 @@
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20
20
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21
21
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$a=["2017-02-14","2017/02/15","20170216",//問題なくマッチ
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22
22
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23
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-
"2017/2/17","2017020180","xxxx-yy-zz",//エラー
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23
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+
"2017/2/17","2017020180","2017/02-19","xxxx-yy-zz",//エラー
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24
24
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25
25
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"0000-00-00","9999-99-99" //極端な数字でもマッチ
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26
26
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27
27
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];
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28
28
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29
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-
$pattern="#^\d{4}[/-]{0,1}\d{2}[/-]{0,1}\d{2}$#";
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29
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+
/* $pattern="#^\d{4}[/-]{0,1}\d{2}[/-]{0,1}\d{2}$#"; */
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30
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+
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31
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/* おかしなパターンを拾うのでいかに修正 */
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32
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+
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33
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$pattern="#^\d{4}([/-]{0,1})\d{2}\\1\d{2}$#";
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30
34
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31
35
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foreach ($a as $val){
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32
36
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