<? echo $a2."<br/>"; $p1 = strpos($a2,'clientindex:')+12; $p2 = strpos($a2,'name:') - $p1 -1; echo substr($a2,$p1,$p2); ?>
若$a2 = "2013/09/09 00:07:43[wextfunc.cpp:325] 尝试登录. clientindex:7175 name:afei0025 key:e10adc3949ba59abbe56e057f20f883e client.version:1.1 server.version:1.1 "
则打印:7175