回答編集履歴
4
修正
answer
CHANGED
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@@ -30,7 +30,7 @@
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30
30
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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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31
31
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色々やりようはあります
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32
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33
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-
```
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33
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+
```HTML
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34
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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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<form method="post"><input type="text" name="a" value="2017/02/15"><input type="submit" value="go"></form>
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<form method="post"><input type="text" name="a" value="20170216"><input type="submit" value="go"></form>
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@@ -43,19 +43,20 @@
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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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<form method="post"><input type="text" name="a" value="2017-00-01"><input type="submit" value="go"></form>
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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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46
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-
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46
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+
```
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47
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-
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47
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+
```PHP
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$pattern='#^(\d{4})([/-]?)(\d{2})\2(\d{2})$#';
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49
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-
$a=filter_input(INPUT_POST,'a',FILTER_VALIDATE_REGEXP,[
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49
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+
$a=!isset($_POST["a"])?NULL:filter_input(INPUT_POST,'a',FILTER_VALIDATE_REGEXP,[
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'options'=>[
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51
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-
'default'=>
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51
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+
'default'=> "",
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'regexp'=> $pattern
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53
53
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],
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54
54
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]);
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55
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+
if(!is_null($a)){
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55
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-
if(preg_match($pattern,$a,$m) and checkdate($m[3],$m[4],$m[1])){
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56
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+
if(preg_match($pattern,$a,$m) and checkdate($m[3],$m[4],$m[1])){
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56
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-
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57
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print date("Y-m-d",strtotime($a))."<br>";
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57
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-
}else{
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58
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}else{
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58
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-
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59
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print "bad data!";
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60
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}
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59
61
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}
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60
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-
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61
62
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```
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3
おまけ
answer
CHANGED
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@@ -23,4 +23,39 @@
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23
23
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print "ng<br>";
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24
24
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}
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25
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}
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26
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+
```
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27
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+
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28
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+
# おまけ
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29
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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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30
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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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31
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+
色々やりようはあります
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32
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+
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33
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+
```PHP
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34
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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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35
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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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36
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+
<form method="post"><input type="text" name="a" value="20170216"><input type="submit" value="go"></form>
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37
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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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38
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<form method="post"><input type="text" name="a" value="2017020180"><input type="submit" value="go"></form>
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39
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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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40
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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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41
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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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<form method="post"><input type="text" name="a" value="0001-01-01"><input type="submit" value="go"></form>
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43
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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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44
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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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45
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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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46
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+
</form>
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47
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+
<?PHP
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48
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$pattern='#^(\d{4})([/-]?)(\d{2})\2(\d{2})$#';
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49
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$a=filter_input(INPUT_POST,'a',FILTER_VALIDATE_REGEXP,[
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50
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'options'=>[
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51
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'default'=> NULL,
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52
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'regexp'=> $pattern
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53
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],
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54
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]);
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55
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if(preg_match($pattern,$a,$m) and checkdate($m[3],$m[4],$m[1])){
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56
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print date("Y-m-d",strtotime($a))."<br>";
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57
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}else{
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58
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print "bad data!";
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59
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+
}
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60
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+
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26
61
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```
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2
修正
answer
CHANGED
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@@ -14,7 +14,7 @@
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14
14
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];
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15
15
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/* $pattern="#^\d{4}[/-]{0,1}\d{2}[/-]{0,1}\d{2}$#"; */
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16
16
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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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17
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-
$pattern="#^\d{4}([/-]
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17
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+
$pattern="#^\d{4}([/-]?)\d{2}\\1\d{2}$#";
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18
18
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foreach ($a as $val){
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19
19
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print $val." is ";
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20
20
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if(preg_match($pattern,$val,$match)){
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1
パターン修正
answer
CHANGED
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@@ -9,10 +9,12 @@
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9
9
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10
10
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```PHP
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11
11
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$a=["2017-02-14","2017/02/15","20170216",//問題なくマッチ
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12
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-
"2017/2/17","2017020180","xxxx-yy-zz",//エラー
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12
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+
"2017/2/17","2017020180","2017/02-19","xxxx-yy-zz",//エラー
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13
13
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"0000-00-00","9999-99-99" //極端な数字でもマッチ
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14
14
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];
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15
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-
$pattern="#^\d{4}[/-]{0,1}\d{2}[/-]{0,1}\d{2}$#";
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15
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+
/* $pattern="#^\d{4}[/-]{0,1}\d{2}[/-]{0,1}\d{2}$#"; */
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16
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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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17
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+
$pattern="#^\d{4}([/-]{0,1})\d{2}\\1\d{2}$#";
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16
18
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foreach ($a as $val){
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17
19
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print $val." is ";
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18
20
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if(preg_match($pattern,$val,$match)){
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