Android programmers learn PHP development (9)-assignment and comparison logic operations-PhpStorm

Value assignment operator number:, +,-, *, %,. Comparison operator number: & gt;, & lt;, & gt;, & lt ;,,!,! Logical operators and or & amp;, or |, not, or! And xorxor are true. The same is a false die () and a message is output, and the current script value assignment operator number is exited: =, + =,-=, * =,/=, % = ,. =
Comparison operator number: >,<,=, >=, <=, == ,! = ,! =
Logical operators and or &, or |, not, or! , Xor
Xor is true and false.
Die () outputs a message and exits the current script.

 "; Echo $ name2 ."
"; $ A + = 1; // equivalent to $ a = $ a + 1; print the result: 6 echo $ ."
"; $ A-= 1; // equivalent to $ a = $ a-1; print the result: 5 echo $ ."
";/** --------------- Split line --------------- */$ str =" Wang Hang "; $ str2 =" Android "; echo $ str. $ str2 ."
"; // Print the result: Wang Hang Android // echo $ str. $ str2.5 ."
"; // You cannot directly connect to 5 echo $ str. $ str2. $ ."
"; // But you can connect to $ a (the value of $ a is 5). print the result: Wang Hang Android 5 echo" Wang Hang Android {$}
"; // Print the result: Wang Hang Android 5 echo" Wang Hang Android ". $ ."
"; // Print the result: Wang Hang Android 5 echo 'Wang hang Android '. $ .'
'; // Print the result: Wang Hang Android 5 echo' Wang Hang Android {$}
'; // Print the result: Wang Hang Android {$ a} echo "Wang Hang Android", $ ,"
"; // Print the result: Wang Hang Android 5 $ str. =" yes "; // print the result: Wang Hang is echo $ str ."
"; $ Str. =" Android programmer "; // print the result: Wang Hang is an Android programmer echo $ str ."
";/** --------------- Split line --------------- */$ html =''; $ Html. =''; $ Html. = "CSDN"; $ html. =''; $ Html. =''; Echo $ html ."
"; // Print the result: CSDN (level 1 title)/*** comparison operator number: >,<,=, >=, <=, == ,! = ,! = */$ A = "007"; $ B = 7; var_dump ($ a = $ B); // print the result: bool (false ), all equals judgment (variable types also need to be the same) echo"
"; Var_dump ($ a = $ B); // print the result: bool (true), equals to echo"
"; Var_dump ($ a = $ B); // print the result: int (7), value assignment echo"
";/*** Logical operator and or &, or |, not, or! , Xor * xor is true, the same as false */var_dump (true & true); // print the result: bool (true) echo"
"; Var_dump (true & false); // print the result: bool (false) echo"
"; Var_dump (true | false); // print the result: bool (true) echo"
"; Var_dump (! True); // print the result: bool (false) echo"
"; Var_dump (! False); // print the result: bool (true) echo"
"; Var_dump (true xor false); // print the result: bool (true) echo"
"; Var_dump (false xor true); // print the result: bool (true) echo"
"; Var_dump (true xor true); // print the result: bool (false) echo"
"; Var_dump (false xor false); // print the result: bool (false) echo"
";/** --------------- Split line --------------- */$ year = 2016; if ($ year % 4 = 0 & $ year % 100! = 0 | $ year % 400! = 0) {echo "this year {$ year} is a leap year.
"; // Print the result: 2016 of this year is a leap year} else {echo" this year {$ year} is a year
";}/** --------------- Split line --------------- * // die (" enter and exit the program! "); // Print the result: enter and exit the program! // Echo "666666"; // this line does not output/** --------------- split line --------------- * // $ link = mysql_connect ("localhost", "root ","") or die ("database connection failed! ");/** --------------- Split line --------------- */$ a = 0; $ B = 0; if ($ a = 3 & $ B = 3) {$ a ++; $ B ++;} echo $. ",". $ B."
"; // Print the result: 1, 4/** --------------- split line ------------- */$ a = 0; $ B = 0; if ($ a = 3 | $ B = 3) {$ a ++; $ B ++;} echo $. ",". $ B."
"; // Print the result: 1, 1/** --------------- split line ------------- */$ a = 0; $ B = 0; if ($ a = 3 | $ B = 3) {$ a ++; $ B ++;} echo $. ",". $ B."
"; // Print the result: 0, 0

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