If an include() is conditional, will PHP include the file even if the condition is not met? -

If an include() is conditional, will PHP include the file even if the condition is not met? -

this has been on mind quite time , figured should seek reply experts. want know if poor programming technique funnel php requests through single file. have been working on website , not sure if scale growth because not 100% of how php handles include() function.

to improve explain how have build quasi framework here snippet of root .htaccess file:

# > standard settings rewriteengine on # ignore media requests rewriterule ^media/ - [l] # funnel requests model rewriterule ^(.*)$ _model.php [qsa]

so except content within media directory passed single script.

inside _model.php have input sanitisation, user authentication, session info gets pulled database, global variables (commonly used variables $longtime, $longip etc...) set. requests routed via interpreting $_server["request_uri"] variable.

essentially have switch() statement chooses module include(). don't understand is: when php executes, execute every single include() regardless of whether or not case directive true?

i concerned after time have lot of these modules - , if php @ runtime include modules end occupying much processing powerfulness , ram...

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edit: asking if php 'read' files potentially might have include. know shouldn't execute code. if 1 of include() 2gb file takes long time process, php read on file before executing?

-- edit: have found similar question (i did search lot before posting one) php behavior of include/require within conditional

i think can close off.

no, php execute include in moment code fragment reached.

this quite important, because can have php include file code directly. e.g.

file1:

<?php echo "foo"; ?>

file2:

<?php echo "before"; include("file1"); echo "after"; ?>

sometimes php processor won't know @ compiletime file include. imagine include("file".mt_rand(1,10));. php won't know filename include moment reaches include statement.

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