php数组转json字符串
在php中可以使用“json_encode()”函数将数组转为字符串，该函数用于把数组进行json编码，其语法是“json_encode(array)”，其参数array表示要转换数组，成功则返回json编码的字符串。
示例
<?php$a = array('<foo>',"'bar'",'"baz"','&blong&', "\xc3\xa9");echo "normal: ", json_encode($a), "\n";echo "tags: ", json_encode($a, json_hex_tag), "\n";echo "apos: ", json_encode($a, json_hex_apos), "\n";echo "quot: ", json_encode($a, json_hex_quot), "\n";echo "amp: ", json_encode($a, json_hex_amp), "\n";echo "unicode: ", json_encode($a, json_unescaped_unicode), "\n";echo "all: ", json_encode($a, json_hex_tag | json_hex_apos | json_hex_quot | json_hex_amp | json_unescaped_unicode), "\n\n";$b = array();echo "empty array output as array: ", json_encode($b), "\n";echo "empty array output as object: ", json_encode($b, json_force_object), "\n\n";$c = array(array(1,2,3));echo "non-associative array output as array: ", json_encode($c), "\n";echo "non-associative array output as object: ", json_encode($c, json_force_object), "\n\n";$d = array('foo' => 'bar', 'baz' => 'long');echo "associative array always output as object: ", json_encode($d), "\n";echo "associative array always output as object: ", json_encode($d, json_force_object), "\n\n";?>
输出结果
normal: ["<foo>","'bar'","\"baz\"","&blong&","\u00e9"]tags: ["\u003cfoo\u003e","'bar'","\"baz\"","&blong&","\u00e9"]apos: ["<foo>","\u0027bar\u0027","\"baz\"","&blong&","\u00e9"]quot: ["<foo>","'bar'","\u0022baz\u0022","&blong&","\u00e9"]amp: ["<foo>","'bar'","\"baz\"","\u0026blong\u0026","\u00e9"]unicode: ["<foo>","'bar'","\"baz\"","&blong&","é"]all: ["\u003cfoo\u003e","\u0027bar\u0027","\u0022baz\u0022","\u0026blong\u0026","é"]empty array output as array: []empty array output as object: {}non-associative array output as array: [[1,2,3]]non-associative array output as object: {"0":{"0":1,"1":2,"2":3}}associative array always output as object: {"foo":"bar","baz":"long"}associative array always output as object: {"foo":"bar","baz":"long"}
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以上就是php数组转json字符串的详细内容。