質問編集履歴
4
正規表現の誤りを修正
test
CHANGED
File without changes
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test
CHANGED
@@ -244,7 +244,7 @@
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$expression = preg_replace('/\s/', '', $expression);
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-
preg_match_all('/[0-9a-zA-Z-_]+|&&|\|\||\(\)/', $expression, $matches);
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247
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+
preg_match_all('/[0-9a-zA-Z-_]+|&&|\|\||\(|\)/', $expression, $matches);
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3
引数と返り値を変更
test
CHANGED
File without changes
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test
CHANGED
@@ -182,9 +182,13 @@
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182
182
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183
183
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function checkFlags($expression, $flags){
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184
184
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185
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-
$postfix = convertToPostfix($expression
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185
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+
$postfix = convertToPostfix($expression);
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186
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+
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+
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188
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+
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-
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$postfix = strtr($postfix, $flags);
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-
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190
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+
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191
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+
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192
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$parts = preg_split('/\s/', $postfix, -1, PREG_SPLIT_NO_EMPTY);
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@@ -200,9 +204,9 @@
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} else {
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203
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-
$b = (
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207
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+
$b = (float)array_pop($stack);
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204
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-
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208
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+
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205
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-
$a = (
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209
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$a = (float)array_pop($stack);
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212
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@@ -236,22 +240,16 @@
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240
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239
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-
function convertToPostfix($expression
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243
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function convertToPostfix($expression) {
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240
244
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241
245
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$expression = preg_replace('/\s/', '', $expression);
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242
246
|
|
247
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+
preg_match_all('/[0-9a-zA-Z-_]+|&&|\|\||\(\)/', $expression, $matches);
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248
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+
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249
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250
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+
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243
251
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if(substr_count($expression, '(') !== substr_count($expression, ')')) return false;
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244
252
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245
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-
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246
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-
|
247
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-
$expression = strtr($expression, $flags);
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248
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-
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249
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-
preg_match_all('/[0-9]+|&&|\|\||\(\)/', $expression, $matches);
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250
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-
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251
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-
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252
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-
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253
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-
if(substr_count($expression, '(') !== substr_count($expression, ')')) return false;
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254
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-
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255
253
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257
255
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$parts = $matches[0];
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@@ -270,59 +268,59 @@
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270
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271
269
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foreach ($parts as $part) {
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271
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if( $part == '&&' || $part == '||' ) {
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273
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-
if (
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273
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if (!empty($stack)) {
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274
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+
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275
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while (true) {
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276
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277
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$end = end($stack);
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279
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if ($end && $priorities[$part] <= $priorities[$end]) {
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280
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281
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$output []= array_pop($stack);
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282
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283
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} else {
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284
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285
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break;
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286
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287
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}
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288
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289
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}
|
290
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291
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}
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292
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293
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+
$stack[] = $part;
|
294
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295
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+
} elseif ($part == '(') {
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296
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297
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$stack[] = $part;
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298
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+
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299
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} elseif ($part == ')') {
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300
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301
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while (count($stack) > 0) {
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302
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303
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$end = end($stack);
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304
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305
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if ($end == '(') {
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306
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307
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array_pop($stack);
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309
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break;
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310
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311
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} else {
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312
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313
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$output[] = array_pop($stack);
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314
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315
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}
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316
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317
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}
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318
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} else {
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$output[] = $part;
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322
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277
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-
} elseif ($part == '(') {
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278
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-
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279
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-
$stack[] = $part;
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280
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-
|
281
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-
} elseif ($part == ')') {
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282
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-
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283
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-
while (count($stack) > 0) {
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284
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-
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285
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-
$end = end($stack);
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286
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-
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287
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-
if ($end == '(') {
|
288
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-
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289
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-
array_pop($stack);
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290
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-
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291
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-
break;
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292
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-
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293
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-
} else {
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294
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-
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295
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-
$output[] = array_pop($stack);
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296
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-
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297
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-
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323
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+
}
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298
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-
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299
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-
}
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300
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-
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301
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-
} else {
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302
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-
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303
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-
if (!empty($stack)) {
|
304
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-
|
305
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-
while (true) {
|
306
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-
|
307
|
-
$end = end($stack);
|
308
|
-
|
309
|
-
if ($end && $priorities[$part] <= $priorities[$end]) {
|
310
|
-
|
311
|
-
$output []= array_pop($stack);
|
312
|
-
|
313
|
-
} else {
|
314
|
-
|
315
|
-
break;
|
316
|
-
|
317
|
-
}
|
318
|
-
|
319
|
-
}
|
320
|
-
|
321
|
-
}
|
322
|
-
|
323
|
-
$stack[] = $part;
|
324
|
-
|
325
|
-
}
|
326
324
|
|
327
325
|
}
|
328
326
|
|
2
floatをintに変更
test
CHANGED
File without changes
|
test
CHANGED
@@ -200,9 +200,9 @@
|
|
200
200
|
|
201
201
|
} else {
|
202
202
|
|
203
|
-
$b = (
|
203
|
+
$b = (int)array_pop($stack);
|
204
|
-
|
204
|
+
|
205
|
-
$a = (
|
205
|
+
$a = (int)array_pop($stack);
|
206
206
|
|
207
207
|
|
208
208
|
|
1
解決方法を追記
test
CHANGED
File without changes
|
test
CHANGED
@@ -129,3 +129,215 @@
|
|
129
129
|
おかしなやり方をしている部分もあると思いますし、根本的に間違っている場合は全く別のやり方でも構いません。
|
130
130
|
|
131
131
|
よろしくお願いします。
|
132
|
+
|
133
|
+
|
134
|
+
|
135
|
+
|
136
|
+
|
137
|
+
|
138
|
+
|
139
|
+
### 追記
|
140
|
+
|
141
|
+
|
142
|
+
|
143
|
+
2017-09-14
|
144
|
+
|
145
|
+
|
146
|
+
|
147
|
+
shimitei様にコメントで教えていただいた逆ポーランド記法を使いソース全体を作り直しました。
|
148
|
+
|
149
|
+
ひとまず正しく動作できているようなので掲載しておきます。改善点や修正点がありましたらコメントか編集をお願い致します。
|
150
|
+
|
151
|
+
|
152
|
+
|
153
|
+
```PHP
|
154
|
+
|
155
|
+
<?php
|
156
|
+
|
157
|
+
$flags = [
|
158
|
+
|
159
|
+
'flag1' => 1,
|
160
|
+
|
161
|
+
'flag2' => 0,
|
162
|
+
|
163
|
+
'flag3' => 0,
|
164
|
+
|
165
|
+
'flag4' => 1,
|
166
|
+
|
167
|
+
'flag5' => 1
|
168
|
+
|
169
|
+
];
|
170
|
+
|
171
|
+
|
172
|
+
|
173
|
+
// 「&&」は AND, 「||」 は OR を表す
|
174
|
+
|
175
|
+
$expression = 'flag1 && (flag2 || flag3) || (flag4 && flag5)';
|
176
|
+
|
177
|
+
|
178
|
+
|
179
|
+
var_dump(checkFlags( $expression, $flags ) );
|
180
|
+
|
181
|
+
|
182
|
+
|
183
|
+
function checkFlags($expression, $flags){
|
184
|
+
|
185
|
+
$postfix = convertToPostfix($expression, $flags);
|
186
|
+
|
187
|
+
|
188
|
+
|
189
|
+
$parts = preg_split('/\s/', $postfix, -1, PREG_SPLIT_NO_EMPTY);
|
190
|
+
|
191
|
+
$stack = [];
|
192
|
+
|
193
|
+
|
194
|
+
|
195
|
+
foreach ($parts as $part) {
|
196
|
+
|
197
|
+
if (is_numeric($part)) {
|
198
|
+
|
199
|
+
$stack[] = $part;
|
200
|
+
|
201
|
+
} else {
|
202
|
+
|
203
|
+
$b = (float)array_pop($stack);
|
204
|
+
|
205
|
+
$a = (float)array_pop($stack);
|
206
|
+
|
207
|
+
|
208
|
+
|
209
|
+
switch ($part) {
|
210
|
+
|
211
|
+
case "&&":
|
212
|
+
|
213
|
+
$x = $a && $b;
|
214
|
+
|
215
|
+
array_push($stack, $x);
|
216
|
+
|
217
|
+
break;
|
218
|
+
|
219
|
+
case "||":
|
220
|
+
|
221
|
+
$x = $a || $b;
|
222
|
+
|
223
|
+
array_push($stack, $x);
|
224
|
+
|
225
|
+
}
|
226
|
+
|
227
|
+
}
|
228
|
+
|
229
|
+
}
|
230
|
+
|
231
|
+
|
232
|
+
|
233
|
+
return (bool)$stack[0];
|
234
|
+
|
235
|
+
}
|
236
|
+
|
237
|
+
|
238
|
+
|
239
|
+
function convertToPostfix($expression, $flags) {
|
240
|
+
|
241
|
+
$expression = preg_replace('/\s/', '', $expression);
|
242
|
+
|
243
|
+
if(substr_count($expression, '(') !== substr_count($expression, ')')) return false;
|
244
|
+
|
245
|
+
|
246
|
+
|
247
|
+
$expression = strtr($expression, $flags);
|
248
|
+
|
249
|
+
preg_match_all('/[0-9]+|&&|\|\||\(\)/', $expression, $matches);
|
250
|
+
|
251
|
+
|
252
|
+
|
253
|
+
if(substr_count($expression, '(') !== substr_count($expression, ')')) return false;
|
254
|
+
|
255
|
+
|
256
|
+
|
257
|
+
$parts = $matches[0];
|
258
|
+
|
259
|
+
|
260
|
+
|
261
|
+
$stack = [];
|
262
|
+
|
263
|
+
$output = [];
|
264
|
+
|
265
|
+
|
266
|
+
|
267
|
+
$priorities = [ '&&' => 2, '||' => 2, '(' => 1, ')' => 1 ];
|
268
|
+
|
269
|
+
|
270
|
+
|
271
|
+
foreach ($parts as $part) {
|
272
|
+
|
273
|
+
if (is_numeric($part)) {
|
274
|
+
|
275
|
+
$output[] = $part;
|
276
|
+
|
277
|
+
} elseif ($part == '(') {
|
278
|
+
|
279
|
+
$stack[] = $part;
|
280
|
+
|
281
|
+
} elseif ($part == ')') {
|
282
|
+
|
283
|
+
while (count($stack) > 0) {
|
284
|
+
|
285
|
+
$end = end($stack);
|
286
|
+
|
287
|
+
if ($end == '(') {
|
288
|
+
|
289
|
+
array_pop($stack);
|
290
|
+
|
291
|
+
break;
|
292
|
+
|
293
|
+
} else {
|
294
|
+
|
295
|
+
$output[] = array_pop($stack);
|
296
|
+
|
297
|
+
}
|
298
|
+
|
299
|
+
}
|
300
|
+
|
301
|
+
} else {
|
302
|
+
|
303
|
+
if (!empty($stack)) {
|
304
|
+
|
305
|
+
while (true) {
|
306
|
+
|
307
|
+
$end = end($stack);
|
308
|
+
|
309
|
+
if ($end && $priorities[$part] <= $priorities[$end]) {
|
310
|
+
|
311
|
+
$output []= array_pop($stack);
|
312
|
+
|
313
|
+
} else {
|
314
|
+
|
315
|
+
break;
|
316
|
+
|
317
|
+
}
|
318
|
+
|
319
|
+
}
|
320
|
+
|
321
|
+
}
|
322
|
+
|
323
|
+
$stack[] = $part;
|
324
|
+
|
325
|
+
}
|
326
|
+
|
327
|
+
}
|
328
|
+
|
329
|
+
|
330
|
+
|
331
|
+
while (count($stack) > 0) {
|
332
|
+
|
333
|
+
$output[] = array_pop($stack);
|
334
|
+
|
335
|
+
}
|
336
|
+
|
337
|
+
|
338
|
+
|
339
|
+
return implode(' ', $output);
|
340
|
+
|
341
|
+
}
|
342
|
+
|
343
|
+
```
|