Fixed parameter part:
$i['columns'] - The current loop is a pattern of several columns.
$i['count'] - Number of units in content array
$i['addrows'] - The number of additional loops when multiple columns are present
$i['loops'] - Total number of loops
Loop variable part:
$i['key'] - The key value of the current array unit.
$i['value'] - Current array unit content
$i['index'] - The internal serial number of the loop starts from 0 and increments one by one
$i['order'] - The sort of loop, starting from 1, incrementing one by one
$i['row'] - What line is currently on, starting from 1
$i['column'] - Which column is currently there, starting from 1
$i['append'] - Is the current loop attached to the loop? 0 means no, 1 means yes
$i['columns'] - The current loop is a pattern of several columns.
$i['count'] - Number of units in content array
$i['addrows'] - The number of additional loops when multiple columns are present
$i['loops'] - Total number of loops
Loop variable part:
$i['key'] - The key value of the current array unit.
$i['value'] - Current array unit content
$i['index'] - The internal serial number of the loop starts from 0 and increments one by one
$i['order'] - The sort of loop, starting from 1, incrementing one by one
$i['row'] - What line is currently on, starting from 1
$i['column'] - Which column is currently there, starting from 1
$i['append'] - Is the current loop attached to the loop? 0 means no, 1 means yes