how to work with php equalto operator(relational operator)
1736
How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators differ?
665
Which equals operator (== vs ===) should be used in JavaScript comparisons?
54719
How to handle equality constraints in this problem?
31416
How to cast array elements to strings in PHP?
108661
In php, is 0 treated as empty?
14513
Why equal operator works for Integer value until 128 number?
124097
How does += (plus equal) work?
53664
What's the difference between equal?, eql?, ===, and ==?
153624
What's the difference between is_null($var) and ($var === null)?
44660
Type-juggling and (strict) greater/lesser-than comparisons in PHP
64531
Should I use != or  for not equal in T-SQL?
34817
How to search by key=>value in a multidimensional array in PHP
67266
Transposing multidimensional arrays in PHP
34939
Ternary operator
120580
What does "=>" mean in PHP?
70584
PHP strpos check against many
149631
Math-like chaining of the comparison operator - as in, "if ( (5<j<=1) )"