php comparators

I PHP rookie a, first read "PHP and MySQL Web development", the comparison of some of the basic things listed, convenient and their own rookie quick start, and easy to review their understanding later.① variable1. The characteristic should be that

This is a half year ago did not write the article, now take out to share under. There may be some incorrect or inaccurate places, some languages may be more frivolous, please forgive me. For an example of the above email data

From PHP 5.3, the middle part of the ternary operator can be omitted. Expression expr1?: Expr3 returns EXPR1 when EXPR1 evaluates to TRUE, otherwise returns EXPR3.PHP$test= ' Rookie Tutorial ';//General Wording$username=isset($test) ?$test: ' Nobody

Like the following optional matching pattern:Sph_match_all, matching all query terms (default mode);Sph_match_any, matches any one of the query words;Sph_match_phrase, the whole query is regarded as a phrase, which requires a complete match in order;

Concrete Example 1. PHP Server ComponentsFor beginners, it is recommended to use the integrated server component, which already includes PHP, Apache, Mysql and other services, eliminating the time spent by developers in the tedious configuration