php--json_encode

<?php
//
echo "lian xu shu zu";
//连续数组，[]表示
$sequential = array('foo','bar','baz','blong');
//数组编码
echo json_encode($sequential);
echo "<br>";

echo "fei lian xu shu zu";
//非连续数组，{}表示
$no_sequential = array(1=>'foo',2=>'bar',3=>'baz',4=>'blong');
//数组解码
echo json_encode($no_sequential);
echo "<br>";
//删除1个元素
unset($sequential[1]);
//数组解码
echo json_encode($sequential);
echo "<br>";
//二维数组
echo "er wei shu zu";
//[]表示数组，{}表示对象
$arr = array(array('name'=>'xiao long'),array('name'=>'zhang san'));
echo json_encode($arr);


显示结果：
lian xu shu zu["foo","bar","baz","blong"]

fei lian xu shu zu{"1":"foo","2":"bar","3":"baz","4":"blong"}

{"0":"foo","2":"baz","3":"blong"}

er wei shu zu[{"name":"xiao long"},{"name":"zhang san"}]