回答編集履歴
2
無名関数追加
test
CHANGED
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@@ -151,3 +151,73 @@
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151
151
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$x = new Some();
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152
152
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153
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```
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154
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+
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155
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156
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157
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無名関数にすれば煩わしくないか、と思ったりした。
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158
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159
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（ソースはアレになりますが）
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160
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161
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162
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163
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- 無名関数版
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164
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165
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166
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167
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```
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168
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169
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<?php
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170
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171
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172
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173
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$data = [
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174
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175
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'a1' => [
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176
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177
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'name' => 'zulu',
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178
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179
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'age' => 24,
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180
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181
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'hobby' => 'train',
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182
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183
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],
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184
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185
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'a2' => [
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186
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187
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'name' => 'amemiya',
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188
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189
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'age' => 28,
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190
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191
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'hobby' => 'gourmet',
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192
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193
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],
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194
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195
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'a3' => [
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196
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197
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'name' => 'sato',
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198
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199
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'age' => 26,
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200
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201
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'hobby' => 'radio',
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202
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203
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],
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204
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205
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];
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206
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207
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usort($data, function($a, $b) {
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208
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209
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if ($a['name'] === $b['name']) {
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210
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211
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return $a['hobby'] > $b['hobby'];
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212
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213
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} else {
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214
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215
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return $a['name'] > $b['name'];
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216
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217
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}
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218
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219
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});
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220
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221
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var_dump($data);
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222
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223
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```
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1
クラス対応版を追加
test
CHANGED
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@@ -65,3 +65,89 @@
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65
65
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}
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66
66
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67
67
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```
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68
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69
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70
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71
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- クラス対応版
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72
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73
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+
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74
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75
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```
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76
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77
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<?php
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78
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79
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class Some {
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80
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81
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function __construct() {
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82
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83
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$this->solve();
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84
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85
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}
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86
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87
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88
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89
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function solve() {
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90
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91
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$data = [
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92
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93
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'a1' => [
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94
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+
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95
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'name' => 'sato',
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96
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+
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97
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'age' => 24,
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98
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+
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99
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'hobby' => 'train',
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100
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+
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101
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],
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102
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+
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103
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'a2' => [
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104
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105
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'name' => 'amemiya',
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106
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+
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107
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'age' => 28,
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108
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+
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109
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'hobby' => 'gourmet',
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110
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+
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111
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],
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112
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+
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113
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+
'a3' => [
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114
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+
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115
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'name' => 'sato',
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116
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+
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117
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+
'age' => 26,
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118
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+
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119
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'hobby' => 'radio',
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120
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+
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121
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],
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122
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+
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123
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];
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124
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+
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125
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+
usort($data, 'self::cond');
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126
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+
|
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127
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+
var_dump($data);
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128
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+
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129
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+
}
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130
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+
|
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131
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+
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132
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+
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133
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+
static function cond($a, $b) {
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134
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+
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135
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+
if ($a['name'] === $b['name']) {
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136
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+
|
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137
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+
return $a['hobby'] > $b['hobby'];
|
|
138
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+
|
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139
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+
} else {
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140
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+
|
|
141
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+
return $a['name'] > $b['name'];
|
|
142
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+
|
|
143
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+
}
|
|
144
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+
|
|
145
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+
}
|
|
146
|
+
|
|
147
|
+
}
|
|
148
|
+
|
|
149
|
+
|
|
150
|
+
|
|
151
|
+
$x = new Some();
|
|
152
|
+
|
|
153
|
+
```
|