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How To Convert Strings to Numbers
How To Convert Strings to Numbers? - PHP Script Tips - Understanding String Literals and Operations
✍: FYIcenter.com
In a numeric context, PHP will automatically convert any string to a numeric value. Strings will be converted into two types of numeric values, double floating number and integer, based on the following rules:
Here is a PHP script example of converting some examples:
<?php $foo = 1 + "10.5"; echo "\$foo=$foo; type is " . gettype ($foo) . "\n"; $foo = 1 + "-1.3e3"; echo "\$foo=$foo; type is " . gettype ($foo) . "\n"; $foo = 1 + "bob-1.3e3"; echo "\$foo=$foo; type is " . gettype ($foo) . "\n"; $foo = 1 + "bob3"; echo "\$foo=$foo; type is " . gettype ($foo) . "\n"; $foo = 1 + "10 Small Pigs"; echo "\$foo=$foo; type is " . gettype ($foo) . "\n"; $foo = 4 + "10.2 Little Piggies"; echo "\$foo=$foo; type is " . gettype ($foo) . "\n"; $foo = "10.0 pigs " + 1; echo "\$foo=$foo; type is " . gettype ($foo) . "\n"; $foo = "10.0 pigs " + 1.0; echo "\$foo=$foo; type is " . gettype ($foo) . "\n"; ?>
This script will print:
$foo=11.5; type is double $foo=-1299; type is double $foo=1; type is integer $foo=1; type is integer $foo=11; type is integer $foo=14.2; type is double $foo=11; type is double $foo=11; type is double
2007-04-20, 4791👍, 0💬
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