== and === in php

One reason for I hate PHP

view plainprint?

1. <?php   
2.   
3.   
4.   
5. if('0001' == '1'){  
6.         echo 'when == test, 0001 and 1 are equal';  
7. }  
8.   
9.   
10. if('0001' === '1'){  
11.         echo 'when === test, 0001 and 1 are equal';  
12. }   
13.   
14. ?>   

<?php 



if('0001' == '1'){
        echo 'when == test, 0001 and 1 are equal';
}


if('0001' === '1'){
        echo 'when === test, 0001 and 1 are equal';
} 

?> 

Output:
when == test, 0001 and 1 are equal

view plainprint?

1. <?php   
2.   
3. if(1 == true){  
4.         echo 'when == test, 1 and true are equal';  
5. }  
6.   
7.   
8. if(1 === true){  
9.         echo 'when === test, 1 and true are equal';  
10.   
11. }  
12.   
13. ?>    

<?php 

if(1 == true){
        echo 'when == test, 1 and true are equal';
}


if(1 === true){
        echo 'when === test, 1 and true are equal';

}

?>  

Output:
when == test, 1 and true are equal

 Note: any number equals to true, 0 equals to false.

view plainprint?

1. <?php   
2.   
3. if('any string' == true){  
4.   
5.         echo 'when == test, any string and true are equal';  
6. }  
7.   
8. if('any string' === true){  
9.         echo 'when === test, any string and true are equal';  
10. }  
11.   
12.   
13. ?>     

<?php 

if('any string' == true){

        echo 'when == test, any string and true are equal';
}

if('any string' === true){
        echo 'when === test, any string and true are equal';
}


?>   

Output:
when == test, any string and true are equal