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feat: add php solution to lc problem: No.1287 (doocs#961)

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Lines changed: 18 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -112,6 +112,24 @@ var findSpecialInteger = function (arr) {`
`112`	`112`	`};`
`113`	`113`	```
`114`	`114`
	`115`	`+### PHP`
	`116`	`+`
	`117`	+```php
	`118`	`+class Solution {`
	`119`	`+ /**`
	`120`	`+ * @param Integer[] $arr`
	`121`	`+ * @return Integer`
	`122`	`+ */`
	`123`	`+ function findSpecialInteger($arr) {`
	`124`	`+ $len = count($arr);`
	`125`	`+ for ($i = 0; $i < $len; $i++) {`
	`126`	`+ if ($arr[$i] == $arr[$i + ($len >> 2)]) return $arr[$i];`
	`127`	`+ }`
	`128`	`+ return -1;`
	`129`	`+ }`
	`130`	`+}`
	`131`	+```
	`132`	`+`
`115`	`133`	`### ...`
`116`	`134`
`117`	`135`	```

Lines changed: 18 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -107,6 +107,24 @@ var findSpecialInteger = function (arr) {`
`107`	`107`	`};`
`108`	`108`	```
`109`	`109`
	`110`	`+### PHP`
	`111`	`+`
	`112`	+```php
	`113`	`+class Solution {`
	`114`	`+ /**`
	`115`	`+ * @param Integer[] $arr`
	`116`	`+ * @return Integer`
	`117`	`+ */`
	`118`	`+ function findSpecialInteger($arr) {`
	`119`	`+ $len = count($arr);`
	`120`	`+ for ($i = 0; $i < $len; $i++) {`
	`121`	`+ if ($arr[$i] == $arr[$i + ($len >> 2)]) return $arr[$i];`
	`122`	`+ }`
	`123`	`+ return -1;`
	`124`	`+ }`
	`125`	`+}`
	`126`	+```
	`127`	`+`
`110`	`128`	`### ...`
`111`	`129`
`112`	`130`	```

Lines changed: 13 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,13 @@`
	`1`	`+class Solution {`
	`2`	`+ /**`
	`3`	`+ * @param Integer[] $arr`
	`4`	`+ * @return Integer`
	`5`	`+ */`
	`6`	`+ function findSpecialInteger($arr) {`
	`7`	`+ $len = count($arr);`
	`8`	`+ for ($i = 0; $i < $len; $i++) {`
	`9`	`+ if ($arr[$i] == $arr[$i + ($len >> 2)]) return $arr[$i];`
	`10`	`+ }`
	`11`	`+ return -1;`
	`12`	`+ }`
	`13`	`+}`

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