PHP instanceof vs. Is_a () detailed

In general PHP instanceof and is_a () function is the same, the difference is due to PHP version different, some PHP version of the is_a () discarded. In this paper, we will analyze the difference between instanceof and is_a () in PHP.

Both the instanceof operator and the Is_a () method are judged whether an object belongs to the class or the class is the parent of this object (used to determine whether a PHP variable belongs to an instance of a class class)

Yes returns TRUE if not, returns FALSE

Difference:

The instanceof operator was introduced in PHP 5. Before this, is_a () was used, but later is_a () was discarded and replaced with instanceof.

Attention:

PHP 5.3.0, and resumed using Is_a ().

Summarize:

PHP's service environment is now generally used php5.0+, so try to use instanceof instead of is_a ()

In summary, if you do not know your server environment, then it is recommended that you use instanceof, so as not to cause unnecessary trouble

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