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PHP Fatal error: Call to undefined function json_decode()

2024-07-20 09:33:32   216人阅读

　　php：5.5，操作系统：ubuntu13.10

　　网站文本编辑器使用的是ueditor，测试上传图片显示后台配置项未成功加载，上传插件不能正常使用。

　　查阅了ueditor的文档，有关运行测试那里先访问ueditor/controller.php，提示出错，再访问ueditor/php/controller.php?action=config，提示PHP Fatal error: Call to undefined function json_decode()。原因是json相关函数为定义。

　　查看php官方文档，从php5.2就开始支持json扩展，可能是意外删掉了json组件，故重新安装。

　　sudo apt-get install php5-json

　　sudo service nginx restart

　　sudo php5-fpm restart

　　问题解决

　　如果php版本太低可以升级到5.2以后，不想重新安装php的话，可以自定义函数 json_encode 和 json_decode

function json_encode( $data ) {    if( is_array($data) || is_object($data) ) {        $islist = is_array($data) && ( empty($data) || array_keys($data) === range(0,count($data)-1) );        if( $islist ) {            $json = ‘[‘ . implode(‘,‘, array_map(‘__json_encode‘, $data) ) . ‘]‘;        } else {            $items = Array();            foreach( $data as $key => $value ) {                $items[] = __json_encode("$key") . ‘:‘ . __json_encode($value);            }            $json = ‘{‘ . implode(‘,‘, $items) . ‘}‘;        }    } elseif( is_string($data) ) {        # Escape non-printable or Non-ASCII characters.        # I also put the \\ character first, as suggested in comments on the ‘addclashes‘ page.        $string = ‘"‘ . addcslashes($data, "\\\"\n\r\t/" . chr(8) . chr(12)) . ‘"‘;        $json    = ‘‘;        $len    = strlen($string);        # Convert UTF-8 to Hexadecimal Codepoints.        for( $i = 0; $i < $len; $i++ ) {            $char = $string[$i];            $c1 = ord($char);            # Single byte;            if( $c1 <128 ) {            $json .= ($c1 > 31) ? $char : sprintf("\\u%04x", $c1);            continue;            }            # Double byte            $c2 = ord($string[++$i]);            if ( ($c1 & 32) === 0 ) {            $json .= sprintf("\\u%04x", ($c1 - 192) * 64 + $c2 - 128);            continue;            }                # Triple                $c3 = ord($string[++$i]);                if( ($c1 & 16) === 0 ) {                $json .= sprintf("\\u%04x", (($c1 - 224) <<12) + (($c2 - 128) << 6) + ($c3 - 128));                continue;        }        # Quadruple        $c4 = ord($string[++$i]);            if( ($c1 & 8 ) === 0 ) {                    $u = (($c1 & 15) << 2) + (($c2>>4) & 3) - 1;                    $w1 = (54<<10) + ($u<<6) + (($c2 & 15) << 2) + (($c3>>4) & 3);                    $w2 = (55<<10) + (($c3 & 15)<<6) + ($c4-128);                    $json .= sprintf("\\u%04x\\u%04x", $w1, $w2);                    }                    }                    } else {                    # int, floats, bools, null                    $json = strtolower(var_export( $data, true ));                    }                    return $json;    }    function json_decode($json)    {        $comment = false;        $out = ‘$x=‘;            for ($i=0; $i<strlen($json); $i++)        {        if (!$comment)            {            if (($json[$i] == ‘{‘) || ($json[$i] == ‘[‘)) $out .= ‘ array(‘;                    else if (($json[$i] == ‘}‘) || ($json[$i] == ‘]‘)) $out .= ‘)‘;                    else if ($json[$i] == ‘:‘) $out .= ‘=>‘;                    else $out .= $json[$i];        }        else $out .= $json[$i];    if ($json[$i] == ‘"‘ && $json[($i-1)]!="\\") $comment = !$comment;    }            eval($out . ‘;‘);    return $x;    }

 

 

 

 

 

PHP Fatal error: Call to undefined function json_decode()


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