PHP is a programming language capable to resume the most common WebMaster programming languages: PERL, CGI scripts, access to MySQL DB and more.
We list here the most common tables.
Precedence
| Level | Operator | Description | Associativity |
| 01 | or, xor, and | Low precedence logical or, xor, and | Left to right |
| 02 | =,+=, -=, *=, /=, %=, &=, |=, ^=, <<=, >>= | assignment operators | Left to right |
| 03 | ||, && | logical or, logical and | Left to right |
| 04 | |, ^ | Bitwise or, bitwise xor | Left to right |
| 05 | &, . | Bitwise and, string concatenation | Left to right |
| 06 | +,. | Addition and subtraction | Left to right |
| 07 | /, *, % | Division, multiplication, modulus | Left to right |
| 08 | >>, << | Shift left, shift right | Left to right |
| 09 | ++,-- | Auto-increment, auto-decrement | Left to Right |
| 10 | +,-,!,~ | Unary plus, unary minus, logical not, bitwaise inversion | Right to Left |
| 11 | ==, !=, <> | Is equal to, is not equal to, is not equal to | None |
| 12 | <, <=, >, >= | Less than, less than or equal to, greater than or equal to | None |
| 13 | ? : | Ternary operator | Left to Right |
| 14 | -> | Class operator | Left to Right |
| 15 | => | Links keys to values in array definition | Left to Right |
Conditionals
| Operator | Description |
| op1 == op2 | Returns true if op1 is equal to op2
For example, 7 == 7 is true |
| op1 != op2
or op1 <> op2 |
Returns true if op1 is equal to op2
For example, 7 == 7 is true |