Regular basic problem

regular cabbage, please guide me! Whether the
rules are exactly the same in different languages, such as php, js. The regular expressions I test on some website regular tools are not correct when written in PHP.

in addition, find a regular way to write a paragraph:
get a piece of text in a document, get curly braces, and its contents, and find the
of the php version. < scritp > var json_txt= {.} < / scritp >.

Mar.20,2021

is generally consistent, but not complete, and the regularities of JS have been castrated, such as JS does not support post-assertion.

JS version:

$pattern = '/\{[^{}]+\}/'; -sharp phpgpreg_match_all
preg_match_all($pattern, 'Hello {world}, { {}', $matches);
var_dump($matches);
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-64f5-1b34895-40f61.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b34895-40f61.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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