Php string concatenation problem


"\appcms\taglib\CmsTagLib"
t

Php7 php-Framework php thinkphp thinkphp5
Jun.09,2022

single quotation marks 

'\app\cms\taglib\CmsTagLib'

double quotation marks 

"\\app\\cms\\taglib\\CmsTagLib"

Php official documentation string chapter single quotation marks / a double quotation mark part

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e834f1-c47.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e834f1-c47.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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