php-now the reptile principle or simple to use regular crawl it?

Regular PHP crawler

I intern small rookie A, the company let write a crawler practice practiced hand, before this completely no concept, just looked at the internet for a while, think the general idea is to grasp down the entire file, with regular expression processing text-like according to the grammar grab things to grab, and then processing, want to ask now is this idea, Take the initial level of the data in the form, now there is no more direct crawl method, in addition, I hope to give a few PHP crawler demo, the company server does not have a Python environment, can only use PHP, thank you.

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