php file_get_contents取文件中数组元素的方法

$s=file_get_contents('http://simonfenci.sinaapp./index.php?key=simon&wd=1314abc');$rule='#(?<=\[word\] =>)\s\w+#';preg_match_all($rule,$s,$arr);print_r($arr);

<?php 
@header('content-type:text/html;charset=utf-8');
function show_bug($msg){
echo "<pre>";
print_r($msg);
echo "</pre>";
}
//ini_set('user_agent','Mozilla/4.0 (patible; MSIE 5.00; Windows 98)');
//$url="http://redhat.//Home/Login/mmzh2/t/user";

// 所有[jb] => 后面的金额，所有金额相加
$url='array.txt';

$s=file_get_contents($url);

$rule='#(?<=\[jb\] =>)\s\w+#';preg_match_all($rule,$s,$arr);

// $bool=is_array($arr);
// var_dump($bool);

//show_bug($arr);
$arr_num=$arr[0];
//array_sum函数返回数组中所有值的总和。
echo '文件中所有jb之和为'.array_sum($arr_num);
?>

Array( [0] => Array ( [id] => 183 [cf] => 0 [date] => 2016-08-26 21:17:32 [zffs1] => 0 [zffs2] => 1 [zffs3] => 0 [jb] => 5000 [zt] => 1 [user] => 18676081117 [qr_zt] => 1 [user_tjr] => 18943636615 [user_nc] => ¿ÉÀÖ [cf_ds] => 0 [jycg_ds] => 0 [yid] => [ok] => 1 ) [1] => Array ( [id] => 240 [cf] => 0 [date] => 2016-09-03 12:06:50 [zffs1] => 1 [zffs2] => 1 [zffs3] => 1 [jb] => 8000 [zt] => 0 [user] => 15192777617 [qr_zt] => 0 [user_tjr] => 13987611435 [user_nc] => Ö콨¸Û [cf_ds] => 0 [jycg_ds] => 0 [yid] => [ok] => 1 ) )