PHP弱类型总结

'' == 0 == false

'123' == 123

'abc' == 0

'123a' == 123

'0x01' == 1

'0e123456789' == '0e987654321' == 0

[false] == [0] == [NULL] == ['']

NULL == false == 0

true == 1

md5('QNKCDZO') == '0e830400451993494058024219903391' == md5('240610708') == '0e462097431906509019562988736854'

md5([1,2,3]) == md5([4,5,6]) == NULL