以下面的代码为例：
<?php
function testing(){
echo 'testing';
return;
}
?>
根据上面的代码，＆＃39;返回的是什么类型的数据/变量;＆＃39;声明回归？
答案 0 :(得分：10)
答案 1 :(得分：7)
返回import time
import sasl
from thrift.protocol.TBinaryProtocol import TBinaryProtocol
from thrift.transport.TSocket import TSocket
from thrift.transport.TTransport import TBufferedTransport
from libs.pyhs4.cloudera.thrift_sasl import TSaslClientTransport
from libs.pyhs4.TCLIService import TCLIService
from libs.pyhs4.TCLIService.ttypes import TOpenSessionReq, TGetTablesReq, TFetchResultsReq,\
TStatusCode, TGetResultSetMetadataReq, TGetColumnsReq, TType, TTypeId, \
TExecuteStatementReq, TGetOperationStatusReq, TFetchOrientation, TCloseOperationReq, \
TCloseSessionReq, TGetSchemasReq, TCancelOperationReq, TGetLogReq
auth = 'PLAIN'
username = 'apanin'
password = 'none'
host = 'cloudera'
port = 10000
test_hql1 = 'select count(*) from test_text'
def sasl_factory():
saslc = sasl.Client()
saslc.setAttr("username", username)
saslc.setAttr("password", password)
saslc.init()
return saslc
def get_type(typeDesc):
for ttype in typeDesc.types:
if ttype.primitiveEntry is not None:
return TTypeId._VALUES_TO_NAMES[ttype.primitiveEntry.type]
elif ttype.mapEntry is not None:
return ttype.mapEntry
elif ttype.unionEntry is not None:
return ttype.unionEntry
elif ttype.arrayEntry is not None:
return ttype.arrayEntry
elif ttype.structEntry is not None:
return ttype.structEntry
elif ttype.userDefinedTypeEntry is not None:
return ttype.userDefinedTypeEntry
def get_value(colValue):
if colValue.boolVal is not None:
return colValue.boolVal.value
elif colValue.byteVal is not None:
return colValue.byteVal.value
elif colValue.i16Val is not None:
return colValue.i16Val.value
elif colValue.i32Val is not None:
return colValue.i32Val.value
elif colValue.i64Val is not None:
return colValue.i64Val.value
elif colValue.doubleVal is not None:
return colValue.doubleVal.value
elif colValue.stringVal is not None:
return colValue.stringVal.value
sock = TSocket(host, port)
transport = TSaslClientTransport(sasl_factory, "PLAIN", sock)
client = TCLIService.Client(TBinaryProtocol(transport))
transport.open()
res = client.OpenSession(TOpenSessionReq(username=username, password=password))
session = res.sessionHandle
query1 = TExecuteStatementReq(session, statement=test_hql1, confOverlay={}, runAsync=True)
response1 = client.ExecuteStatement(query1)
opHandle1 = response1.operationHandle
while True:
time.sleep(1)
q1 = TGetOperationStatusReq(operationHandle=opHandle1)
res1 = client.GetOperationStatus(q1)
lq = TGetLogReq(opHandle1)
rq = client.GetLog(lq)
if res1.operationState == 2:
break
req = TCloseOperationReq(operationHandle=opHandle1)
client.CloseOperation(req)
req = TCloseSessionReq(sessionHandle=session)
client.CloseSession(req)
。见Demo
null答案 2 :(得分：2)
您的代码将返回 NULL
返回引用的函数可能返回NULL值。这与通过引用传递的函数参数不能传递为NULL（或实际上任何不是变量的事实）的事实不一致。
即
<?php
function &testRet()
{
return NULL;
}
if (testRet() === NULL)
{
echo "NULL";
}
?>
解析罚款并回显NULL