php读写json文件

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PHP Simple Comments Read/Write jSon data to text file

A few days ago i had to build a simple comment form. First i thought about MYSQL etc, but this all seems to be too complicated. So i came up with a simple solution based on jSon and a TXT file.

So that’s how it cooks:

1. Load the text file with the comments and convert it to an array with json_decode 

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/* get comments from file */

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

 
/* create array list from comments */

$commentsList
 =
 json_decode
(
$commentsText
,
true
)
;

2. Check if a new comment was posted and save to file when valid. 

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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
)
;

}

3. Then we can loop the comment list and create HTML for the output 

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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>"
;

4. Then we add the HTML form and the list with comments 

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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
>

I know simple but i thought to share it, you can download the full example including sorting and some more validation stuff, or check out the example page .

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posted on 2011-11-15 10:02  圣者  阅读(910)  评论(0)    收藏  举报

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