回答編集履歴
4
修正
test
CHANGED
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@@ -66,7 +66,7 @@
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66
66
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67
67
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$data[]=$subject;
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68
68
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69
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-
$sql.="or concat('%',subject,'%')
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69
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+
$sql.="or ? like concat('%',subject,'%') ";
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70
70
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71
71
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$data[]=$subject;
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72
72
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@@ -82,7 +82,7 @@
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82
82
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83
83
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$data[]=$teacher;
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84
84
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85
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-
$sql.="or concat('%',teacher,'%')
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85
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+
$sql.="or ? like concat('%',teacher,'%') ";
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86
86
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87
87
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$data[]=$teacher;
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88
88
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3
typo
test
CHANGED
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@@ -60,7 +60,7 @@
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60
60
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61
61
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if(!is_null($subject)){
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62
62
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63
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-
$sql.="and ( 0";
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63
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+
$sql.="and ( 0 ";
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64
64
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65
65
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$sql.="or subject like concat('%',?,'%') ";
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66
66
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@@ -76,7 +76,7 @@
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76
76
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77
77
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if(!is_null($teacher)){
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78
78
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79
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-
$sql.="and ( 0";
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79
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+
$sql.="and ( 0 ";
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80
80
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81
81
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$sql.="or teacher like concat('%',?,'%') ";
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82
82
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2
修正
test
CHANGED
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@@ -39,3 +39,61 @@
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39
39
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```
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40
40
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41
41
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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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42
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+
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43
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44
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45
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+
# 修正版
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46
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+
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47
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+
```PHP
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48
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+
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49
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+
$sql = "SELECT * FROM table WHERE 1 ";
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50
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+
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51
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$data=[];
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52
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+
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53
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if(!is_null($difficulty)){
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54
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+
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55
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$sql.="and difficulty=? ";
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56
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+
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57
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$data[]=$difficulty;
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58
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+
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59
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}
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60
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+
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61
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if(!is_null($subject)){
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62
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63
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+
$sql.="and ( 0";
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64
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65
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+
$sql.="or subject like concat('%',?,'%') ";
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66
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+
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67
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$data[]=$subject;
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68
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+
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69
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$sql.="or concat('%',subject,'%') like ? ";
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70
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+
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71
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$data[]=$subject;
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72
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+
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73
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+
$sql.=") ";
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74
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+
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75
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}
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76
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+
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77
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if(!is_null($teacher)){
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78
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79
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+
$sql.="and ( 0";
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80
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+
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81
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+
$sql.="or teacher like concat('%',?,'%') ";
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82
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+
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83
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+
$data[]=$teacher;
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84
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+
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85
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+
$sql.="or concat('%',teacher,'%') like ? ";
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86
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+
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87
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$data[]=$teacher;
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88
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+
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89
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+
$sql.=") ";
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90
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+
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91
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}
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92
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+
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93
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+
$stmt = $pdo->prepare($sql);
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94
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95
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$stmt->execute($data);
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96
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97
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+
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98
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+
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99
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```
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1
修正
test
CHANGED
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@@ -1,16 +1,16 @@
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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
2
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3
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-
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3
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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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4
4
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5
5
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```PHP
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6
6
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7
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-
$sql = "SELECT * FROM table
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7
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+
$sql = "SELECT * FROM table WHERE 1 ";
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8
8
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9
9
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$data=[];
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10
10
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11
11
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if(!is_null($difficulty)){
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12
12
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13
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-
$sql.="and difficulty=?";
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13
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+
$sql.="and difficulty=? ";
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14
14
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15
15
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$data[]=$difficulty;
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16
16
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@@ -18,7 +18,7 @@
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18
18
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19
19
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if(!is_null($subject)){
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20
20
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21
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-
$sql.="and subject like ?";
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21
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+
$sql.="and subject like ? ";
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22
22
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23
23
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$data[]="%".$subject."%";
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24
24
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@@ -26,7 +26,7 @@
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26
26
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27
27
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if(!is_null($teacher)){
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28
28
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29
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-
$sql.="and teacher like ?";
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29
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+
$sql.="and teacher like ? ";
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30
30
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31
31
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$data[]="%".$teacher."%";
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32
32
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