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Use isset() Instead of strlen() - PHP
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Tagged in : PHP
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Use isset() Instead of strlen()
When you treat strings as arrays, each character in the string is an element in the array. By determining whether a particular element exists, you can determine whether the string is at least that many characters long.
<?php
if (isset($username[5])) {
// The username is at least six characters long.
}?>
Note that the first character is element 0, so $username[5] is the sixth character in $username.
The reason this is slightly faster than strlen() is complicated. The strlen() is a function, and isset() is a language construct.
Generally speaking, calling a function is more expensive than using a language construct.
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By Sanju, On - 2010-02-01 |
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