(mongodb >=1.0.0)
MongoDB\BSON\toJSON — 返回BSON值的旧版扩展JSON表示形式
自扩展版本1.20.0起，此函数已已弃用，并将从2.0中移除。应用程序应改用MongoDB\BSON\Document::toCanonicalExtendedJSON() 或 MongoDB\BSON\Document::toRelaxedExtendedJSON()。
将BSON字符串转换为其» 旧版扩展JSON表示形式。
注意: 存在几种用于表示BSON的JSON格式。此函数实现了» MongoDB扩展JSON中定义的“严格模式”，已被» 扩展JSON规范中定义的规范和宽松格式所取代，并由MongoDB\BSON\toCanonicalExtendedJSON()和MongoDB\BSON\toRelaxedExtendedJSON()分别实现。
» JSON不支持NAN和INF，并且MongoDB的旧版扩展JSON格式未定义这些值的替代表示形式（» libbson将输出nan和inf字面量，这些字面量可能无法解析为有效的JSON）。如果您正在处理可能包含非有限数字的BSON，请使用MongoDB\BSON\toCanonicalExtendedJSON()或MongoDB\BSON\toRelaxedExtendedJSON()。
bson (字符串)要转换的BSON值。
转换后的JSON值。
示例 #1 MongoDB\BSON\toJSON()示例
<?php
$documents = [
[ 'null' => null ],
[ 'boolean' => true ],
[ 'string' => 'foo' ],
[ 'int32' => 123 ],
[ 'int64' => 4294967295 ],
[ 'double' => 1.0, ],
[ 'nan' => NAN ],
[ 'pos_inf' => INF ],
[ 'neg_inf' => -INF ],
[ 'array' => [ 'foo', 'bar' ]],
[ 'document' => [ 'foo' => 'bar' ]],
[ 'oid' => new MongoDB\BSON\ObjectId('56315a7c6118fd1b920270b1') ],
[ 'dec128' => new MongoDB\BSON\Decimal128('1234.5678') ],
[ 'binary' => new MongoDB\BSON\Binary('foo', MongoDB\BSON\Binary::TYPE_GENERIC) ],
[ 'date' => new MongoDB\BSON\UTCDateTime(1445990400000) ],
[ 'timestamp' => new MongoDB\BSON\Timestamp(1234, 5678) ],
[ 'regex' => new MongoDB\BSON\Regex('pattern', 'i') ],
[ 'code' => new MongoDB\BSON\Javascript('function() { return 1; }') ],
[ 'code_ws' => new MongoDB\BSON\Javascript('function() { return a; }', ['a' => 1]) ],
[ 'minkey' => new MongoDB\BSON\MinKey ],
[ 'maxkey' => new MongoDB\BSON\MaxKey ],
];
foreach ($documents as $document) {
$bson = MongoDB\BSON\fromPHP($document);
echo MongoDB\BSON\toJSON($bson), "\n";
}
?>以上示例将输出
{ "null" : null }
{ "boolean" : true }
{ "string" : "foo" }
{ "int32" : 123 }
{ "int64" : 4294967295 }
{ "double" : 1.0 }
{ "nan" : nan }
{ "pos_inf" : inf }
{ "neg_inf" : -inf }
{ "array" : [ "foo", "bar" ] }
{ "document" : { "foo" : "bar" } }
{ "oid" : { "$oid" : "56315a7c6118fd1b920270b1" } }
{ "dec128" : { "$numberDecimal" : "1234.5678" } }
{ "binary" : { "$binary" : "Zm9v", "$type" : "00" } }
{ "date" : { "$date" : 1445990400000 } }
{ "timestamp" : { "$timestamp" : { "t" : 5678, "i" : 1234 } } }
{ "regex" : { "$regex" : "pattern", "$options" : "i" } }
{ "code" : { "$code" : "function() { return 1; }" } }
{ "code_ws" : { "$code" : "function() { return a; }", "$scope" : { "a" : 1 } } }
{ "minkey" : { "$minKey" : 1 } }
{ "maxkey" : { "$maxKey" : 1 } }