在以下字符串中Content-Type: application/octet-stream;
charset="gbk";
name="=?gbk?B?cG9wM8rV0MUucmFy?="
Content-Disposition: attachment; filename="=?gbk?B?cG9wM8rV0MUucmFy?="
Content-Transfer-Encoding: base64UmFyIRoHAM+QcwAADQAAAAAAAADFRHQgkC0AmgYAAMErAAAC8f4euglmXzMdMwgAIAAAAHBv
cDMucGhwALCA+n0MGVDMzNPNQVvfQN/DmoMUNWuSty9IFcUoYkm7sGzY5sbnjttFCbRbiETS
dXRLr22f99AatklSTJKKLTTLSKct2zRX5JtHMzmdHMwpF/ls6znM6SCAcHx8OYcB4fEnAPz/
Lb9PV9TfYVccBjax+P2k6voPw6oBfnQq2CpzNOOsq4gqJJWZnags26pYsVxfvM7N9plkN91f
rlK81HhOVdErd7gubtvi4t/du7+9pLGFsIYOs4TjWxPQge17GsNTaS7WDeewqaIS/R5kgAC2
71NSL+Ap/n9QxD17AEAHAA==------=_NextPart_47281889_084C94A0_2EA9604A--用正则得到 base64 和
UmFyIRoHAM+QcwAADQAAAAAAAADFRHQgkC0AmgYAAMErAAAC8f4euglmXzMdMwgAIAAAAHBv
cDMucGhwALCA+n0MGVDMzNPNQVvfQN/DmoMUNWuSty9IFcUoYkm7sGzY5sbnjttFCbRbiETS
dXRLr22f99AatklSTJKKLTTLSKct2zRX5JtHMzmdHMwpF/ls6znM6SCAcHx8OYcB4fEnAPz/
Lb9PV9TfYVccBjax+P2k6voPw6oBfnQq2CpzNOOsq4gqJJWZnags26pYsVxfvM7N9plkN91f
rlK81HhOVdErd7gubtvi4t/du7+9pLGFsIYOs4TjWxPQge17GsNTaS7WDeewqaIS/R5kgAC2
71NSL+Ap/n9QxD17AEAHAA==两个字符串
charset="gbk";
name="=?gbk?B?cG9wM8rV0MUucmFy?="
Content-Disposition: attachment; filename="=?gbk?B?cG9wM8rV0MUucmFy?="
Content-Transfer-Encoding: base64UmFyIRoHAM+QcwAADQAAAAAAAADFRHQgkC0AmgYAAMErAAAC8f4euglmXzMdMwgAIAAAAHBv
cDMucGhwALCA+n0MGVDMzNPNQVvfQN/DmoMUNWuSty9IFcUoYkm7sGzY5sbnjttFCbRbiETS
dXRLr22f99AatklSTJKKLTTLSKct2zRX5JtHMzmdHMwpF/ls6znM6SCAcHx8OYcB4fEnAPz/
Lb9PV9TfYVccBjax+P2k6voPw6oBfnQq2CpzNOOsq4gqJJWZnags26pYsVxfvM7N9plkN91f
rlK81HhOVdErd7gubtvi4t/du7+9pLGFsIYOs4TjWxPQge17GsNTaS7WDeewqaIS/R5kgAC2
71NSL+Ap/n9QxD17AEAHAA==------=_NextPart_47281889_084C94A0_2EA9604A--用正则得到 base64 和
UmFyIRoHAM+QcwAADQAAAAAAAADFRHQgkC0AmgYAAMErAAAC8f4euglmXzMdMwgAIAAAAHBv
cDMucGhwALCA+n0MGVDMzNPNQVvfQN/DmoMUNWuSty9IFcUoYkm7sGzY5sbnjttFCbRbiETS
dXRLr22f99AatklSTJKKLTTLSKct2zRX5JtHMzmdHMwpF/ls6znM6SCAcHx8OYcB4fEnAPz/
Lb9PV9TfYVccBjax+P2k6voPw6oBfnQq2CpzNOOsq4gqJJWZnags26pYsVxfvM7N9plkN91f
rlK81HhOVdErd7gubtvi4t/du7+9pLGFsIYOs4TjWxPQge17GsNTaS7WDeewqaIS/R5kgAC2
71NSL+Ap/n9QxD17AEAHAA==两个字符串
Content-Type: application/octet-stream;
charset= "gbk ";
name= "=?gbk?B?cG9wM8rV0MUucmFy?= "
Content-Disposition: attachment; filename= "=?gbk?B?cG9wM8rV0MUucmFy?= "
Content-Transfer-Encoding: base64fdsa UmFyIRoHAM+QcwAADQAAAAAAAADFRHQgkC0AmgYAAMErAAAC8f4euglmXzMdMwgAIAAAAHBv
cDMucGhwALCA+n0MGVDMzNPNQVvfQN/DmoMUNWuSty9IFcUoYkm7sGzY5sbnjttFCbRbiETS
dXRLr22f99AatklSTJKKLTTLSKct2zRX5JtHMzmdHMwpF/ls6znM6SCAcHx8OYcB4fEnAPz/
Lb9PV9TfYVccBjax+P2k6voPw6oBfnQq2CpzNOOsq4gqJJWZnags26pYsVxfvM7N9plkN91f
rlK81HhOVdErd7gubtvi4t/du7+9pLGFsIYOs4TjWxPQge17GsNTaS7WDeewqaIS/R5kgAC2
71NSL+Ap/n9QxD17AEAHAA==
fdsf
------=_NextPart_47281889_084C94A0_2EA9604A--
TEXT;
preg_match_all("/Encoding\:\s*?(.*)\r\n\r\n(.*)(\r\n\r\n|$)/Uis",$str,$nn);
echo "Content-Transfer-Encoding:".$nn[1][0];
echo "\r\n".$nn[2][0];