concat vs string中的变量 [英] concat vs variable in string
本文介绍了concat vs string中的变量的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
" {$ _ SERVER [''DOCUMENT_ROOT'']} / inc / mysql-connect.php"
比
$更有效率b $ b $ _SERVER [''DOCUMENT_ROOT'']。" /inc/mysql-connect.php"
？
或者它仍然可以幕后串联？我听说
串联是昂贵的......（即使在这种情况下它可以忽略不计）
解决方案
_SERVER ['' DOCUMENT_ROOT'']} / inc / mysql-connect.php"
比
更有效
_SERVER [''DOCUMENT_ROOT'']。 ; /inc/mysql-connect.php"
？
或者它仍然在幕后进行连接？我听说
串联是昂贵的......（即使在这种情况下它可以忽略不计）
"标记" < mn ******* @ gmail.comha scritto nel messaggio
新闻：a4 ********************** ************ @ o40g2000 prn.googlegroups.com ...
是
" {
Is
"{$_SERVER[''DOCUMENT_ROOT'']}/inc/mysql-connect.php"
more efficient than
$_SERVER[''DOCUMENT_ROOT'']."/inc/mysql-connect.php"
?
Or does it still do a concatenation behind the scenes? I hear
concatenation is expensive... (even if its negligible in this scenario)解决方案_SERVER[''DOCUMENT_ROOT'']}/inc/mysql-connect.php"
more efficient than
_SERVER[''DOCUMENT_ROOT'']."/inc/mysql-connect.php"
?
Or does it still do a concatenation behind the scenes? I hear
concatenation is expensive... (even if its negligible in this scenario)
"Mark" <mn*******@gmail.comha scritto nel messaggio
news:a4**********************************@o40g2000 prn.googlegroups.com...Is
"{
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