How do you write php preg_match rules?

* * the string that needs to be matched:
p1.html
p2.html
p3.html
.
only numbers change. How to write such a rule? * *

Php
Nov.02,2021

I did it myself, preg_match ("/ ^ p ([0-9] +). Html$/", $p), right?

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-64f5-1bf3f04-316ff.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf3f04-316ff.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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