php读写json文件

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/* get comments from file */

$commentsText
=
file_get_contents
(
'comments.txt'
)
;

/* create array list from comments */

$commentsList
=
json_decode
(
$commentsText
,
true
)
;

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/* check if new comment is posted and minimum 3 characters are set */

if
(
!
empty
(
$_POST
[
'comment'
]
)
&&
strlen
(
$sComment
)
>
3
)
{

/* get posted comment and remove all HTML */

$sComment
=
strip_tags
(
$_POST
[
'comment'
]
)
;

/* add comment, client IP and date to array */

$commentsList
[
'comments'
]
[
]
=
array
(

'text'
=>
$sComment
,

'ip'
=>
$_SERVER
[
'REMOTE_ADDR'
]
,

'date'
=>
time
(
)

)
;

/* convert comments to string */

$commentsText
=
json_encode
(
$commentsList
)
;

/* save comment to file */

file_put_contents
(
$commentsFile
,
$commentsText
)
;

}

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/* create html list */

$commentsHTML
=
"<ul>"
;

/* loop all comments */

foreach
(
$commentsList
[
'comments'
]
as
$commentItem
)
{

// add comment to html list

$commentsHTML
.=
"<li>"
.
$commentItem
[
'text'
]
.
"</li>"
;

}

/* close html comments list */

$commentsHTML
.=
"</ul>"
;

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<form
id
=
"comments"
method
=
"POST"
><form
id
=
"comments"
method
=
"POST"
>

<h1
>
Comments?</
h2
>

<div
><?=
$errorMessage?></
div
>

<textarea
id
=
"comment"
name
=
"comment"
cols
=
"70"
>
</
textarea
><br
/
>

<input
type
=
"submit"
value
=
"yes"
/
>

<?=
$commentsHTML?>

</
form
>