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Number comparisons in PHP 8
When we compare a numeric in PHP 8, it will use number comparison. Else it will convert the number to a string and will use the string comparison.
The string can be categorized in three ways −
A string that contains only numeric. Example − 1234 or 1.24e1.
A leading–numeric string − A leading string starts with a numeric string but it should be followed with non-numeric characters including the white space. Example − 12xyz or “123”
Non-numeric string − The string which cannot be numeric and also a non-leading numeric string.
Example − PHP 7
0=='foo' // PHP 7 will return true.
Example − PHP 8
0 =='foo' // PHP 8 will return false.
Example − PHP 8 program using Saner string to number comparisons.
<?php $x=[ "1" => "first Integer", "0123" =>"The integer index with leading 0", "12str" =>"using leading numeric string", " 1" => "using leading whitespace", "2.2" => "using floating number", ]; print_r($x); ?>
Output
Array ( [1] => first Integer [0123] => The integer index with leading 0 [12str] => using leading numeric string [ 1] => using leading whitespace [2.2] => using floating number )
Updated on: 01-Apr-2021
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