php test for null

The test data is real, but only for reference. Welcome to the discussion.In addition to comparison, it can also be used by PHP and JSP programmers to optimize their own programs.I. Arithmetic Operations A. Test Standards Loop n times and perform

A few days ago in the CU saw someone compare PHP and jsp,.net, the results show that PHP is much lower than jsp,.net performance. I think even if there is a gap, it should not be so big, so carefully test the performance gap between several. Since

Several methods for determining null variables in PHP 1. isset function: determines whether a variable is initialized. Note: it does not determine whether the variable is null and can be used to determine whether the elements in the array have

Last month I specifically introduced the PHP introductory tutorial on the basic syntax of PHP introductory learning, mainly introduced several commonly used PHP tags, the composition of PHP statements, PHP comments, and so on, today's PHP

PHP features: the command line mode starts with version 4.3.0. PHP provides a new type of cli sapi (Server Application Programming Interface, Server Application Programming Port) support, named CLI, command Line Interface, that is, Command Line

PHP, a nested abbreviated name, is an abbreviation for the English Super Text preprocessing language (Php:hypertext preprocessor). PHP is an HTML embedded language, PHP and Microsoft's ASP quite a bit similar, is a server-side implementation of

PHP 7 Installation and Use experience greatly improves performance, strong compatibility, and insufficient Scalability (be cautious when upgrading PHP). Be cautious when installing and using PHP 7. With the release of PHP 7, the performance and

Source: www. oschina. netquestion57579_501_www.oschina.netquestion1579_000062. I think about it in the middle of the night. I thought about it before, after, when I decided to delete my blog account yesterday afternoon. Open the computer, open OSC,

PHP is a loosely typed programming language, and it is an indispensable step in a function to examine the "type" of the passed parameter value and whether the value is null or NULL. Type check Starting with PHP5, PHP allows type

Oracle| Object | data The original developer of a new PHP data object (PDO) Data abstraction Layer gives you a brief introduction to the abstraction layer, focusing on running with Oracle. Need php:5.0Need other: Oracle 8 or later client