Diff of PHP/Trap

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* 三項演算子 [#o3739950]
* 0 と空文字 [#0null] [#v2eef3f9]

* foreach & [#w0112d16]
* 三項演算子 [#ternary]

* 0 と空文字 [#v4cae681]
* foreach & [#foreachref]

* $a[0] [#s2782ff3]
* string と $a[0] [#string0]

* empty [#ob8c0189]
* empty [#empty]

* isset と array_exists [#oaafe289]
* isset と array_exists [#isset]

* array_merge と + と index [#r8650094]
* array_merge と + と index [#array_merge]

* $_GET と . [#j97a813d]
* $_GET と . [#get]

* <?php ?> の前後の空白 [#g1ecf2ea]
* <?php ?> の前後の空白 [#phptag]


* 文字列から数値への変換 [#b8640252]

* application/xhtml+xml [#h4b15520]

* auto detect [#g446be64]
* encoding auto detect [#encoding]

* 循環参照 (過去形?) [#cyclicref]

* 循環参照 (過去形?) [#d6253280]
* ref_count上限 (過去形) [#ref_count]

* ref_count上限 (過去形) [#ccc4d47f]