Not equal to and in PHP

Question

I ve always done this  if   foo      bar   But I realized that if   foo     bar  is correct too   Double   still works and has always worked for me  but whenever I search PHP operators I find no information on double    so I assume I ve always have done this wrong  but it works anyway  Should I change all my     to    just for the sake of it

User · Answer

You can find the info here  http   www php net manual en language operators comparison php  It s scarce because it wasn t added until PHP4   What you have is fine though  if you know there may be a type difference then it s a much better comparison  since it s testing value and type in the comparison  not just value

User · Answer

a      b TRUE if  a is not equal to  b  or they are not of the same type  Please Refer to http   php net manual en language operators comparison php

User · Answer

and    do not take into account the data type of the variables you compare  So these would all return true    0       0 false    0 NULL     false       and     do take into account the data type  That means comparing a string to a boolean will never be true because they re of different types for example  These will all return false    0        0 false     0 NULL      false   You should compare data types for functions that return values that could possibly be of ambiguous truthy falsy value  A well-known example is strpos        This returns 0 because F exists as the first character  but as my above example     0 could mean false  so using    or    would return an incorrect result var dump strpos  Foo    F      false       bool false  var dump strpos  Foo    F       false      bool true   it exists so false isn t returned

User · Answer

should match the value and data type     just match the value ignoring the data type   num    1    num2   1    num     num2     returns true      num      num2     returns false because  num is a string and  num2 is an integer

[php] Not equal to != and !== in PHP

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