'string'int(4)
string(12) "Syntax error"
100int(0)
string(8) "No error"
1.int(4)
string(12) "Syntax error"
1.0int(0)
string(8) "No error"
.5int(4)
string(12) "Syntax error"
trueint(0)
string(8) "No error"
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
'string'int(4)
string(12) "Syntax error"
100int(0)
string(8) "No error"
1.int(0)
string(8) "No error"
1.0int(0)
string(8) "No error"
.5int(0)
string(8) "No error"
trueint(0)
string(8) "No error"