回答編集履歴
4
修正
answer
CHANGED
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@@ -32,7 +32,7 @@
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32
32
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$sql.="and ( 0 ";
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33
33
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$sql.="or subject like concat('%',?,'%') ";
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34
34
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$data[]=$subject;
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35
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-
$sql.="or concat('%',subject,'%')
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35
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+
$sql.="or ? like concat('%',subject,'%') ";
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36
36
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$data[]=$subject;
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37
37
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$sql.=") ";
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38
38
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}
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@@ -40,7 +40,7 @@
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40
40
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$sql.="and ( 0 ";
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41
41
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$sql.="or teacher like concat('%',?,'%') ";
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42
42
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$data[]=$teacher;
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43
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-
$sql.="or concat('%',teacher,'%')
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43
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+
$sql.="or ? like concat('%',teacher,'%') ";
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44
44
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$data[]=$teacher;
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45
45
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$sql.=") ";
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46
46
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}
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3
typo
answer
CHANGED
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@@ -29,7 +29,7 @@
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29
29
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$data[]=$difficulty;
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30
30
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}
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31
31
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if(!is_null($subject)){
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32
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-
$sql.="and ( 0";
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32
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+
$sql.="and ( 0 ";
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33
33
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$sql.="or subject like concat('%',?,'%') ";
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34
34
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$data[]=$subject;
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35
35
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$sql.="or concat('%',subject,'%') like ? ";
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@@ -37,7 +37,7 @@
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37
37
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$sql.=") ";
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38
38
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}
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39
39
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if(!is_null($teacher)){
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40
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-
$sql.="and ( 0";
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40
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+
$sql.="and ( 0 ";
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41
41
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$sql.="or teacher like concat('%',?,'%') ";
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42
42
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$data[]=$teacher;
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43
43
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$sql.="or concat('%',teacher,'%') like ? ";
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2
修正
answer
CHANGED
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@@ -18,4 +18,33 @@
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18
18
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$stmt = $pdo->prepare($sql);
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19
19
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$stmt->execute($data);
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20
20
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```
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21
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-
ただし前方後方一致はパフォーマンスがでないので注意が必要
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21
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+
ただし前方後方一致はパフォーマンスがでないので注意が必要
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22
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+
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23
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+
# 修正版
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24
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+
```PHP
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25
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$sql = "SELECT * FROM table WHERE 1 ";
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26
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$data=[];
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27
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if(!is_null($difficulty)){
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28
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$sql.="and difficulty=? ";
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29
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+
$data[]=$difficulty;
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30
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}
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31
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+
if(!is_null($subject)){
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32
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+
$sql.="and ( 0";
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33
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+
$sql.="or subject like concat('%',?,'%') ";
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34
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+
$data[]=$subject;
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35
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+
$sql.="or concat('%',subject,'%') like ? ";
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36
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+
$data[]=$subject;
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37
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+
$sql.=") ";
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38
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+
}
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39
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+
if(!is_null($teacher)){
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40
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+
$sql.="and ( 0";
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41
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+
$sql.="or teacher like concat('%',?,'%') ";
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42
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+
$data[]=$teacher;
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43
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+
$sql.="or concat('%',teacher,'%') like ? ";
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44
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+
$data[]=$teacher;
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45
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+
$sql.=") ";
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46
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+
}
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47
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+
$stmt = $pdo->prepare($sql);
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48
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+
$stmt->execute($data);
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49
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+
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50
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+
```
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1
修正
answer
CHANGED
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@@ -1,18 +1,18 @@
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1
1
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流れ的にはこうします
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2
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-
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2
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+
※追記：スペースの抜けだけ修正しました
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3
3
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```PHP
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4
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-
$sql = "SELECT * FROM table
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4
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+
$sql = "SELECT * FROM table WHERE 1 ";
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5
5
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$data=[];
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6
6
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if(!is_null($difficulty)){
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7
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-
$sql.="and difficulty=?";
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7
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+
$sql.="and difficulty=? ";
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8
8
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$data[]=$difficulty;
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9
9
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}
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10
10
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if(!is_null($subject)){
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11
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-
$sql.="and subject like ?";
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11
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+
$sql.="and subject like ? ";
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12
12
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$data[]="%".$subject."%";
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13
13
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}
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14
14
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if(!is_null($teacher)){
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15
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-
$sql.="and teacher like ?";
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15
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+
$sql.="and teacher like ? ";
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16
16
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$data[]="%".$teacher."%";
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17
17
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}
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18
18
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$stmt = $pdo->prepare($sql);
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