PHP giving wrong calcuation
61092
PHP bitwise left shifting 32 spaces problem and bad results with large numbers arithmetic operations
141886
Incorrect notation in math?
59642
Strange echo, print behaviour in PHP?
31738
Python math is wrong
152804
Double? Integer? -- PHP
132682
What does a leading zero do for a php int?
65510
Why does this function return a different value every time?
99310
PHP How do I round down to two decimal places?
4772
Difference between "not equal" operators  and != in PHP
126904
math.sin incorrect result
104346
Does PHP have short-circuit evaluation?
81502
Getting different output from seemingly identical calculations
102306
Why is this simple calculation of two doubles inaccurate?
40367
PHP simple maths quiz program
32232
How does the "&" operator work in a PHP function?
3171
Working with large numbers in PHP
48064
PHP - DateTime month difference not accounting for year difference