Help needed to remove last portion of a string

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January 21st, 2013, 05:48 PM

eeji

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PHP - Help needed to remove last portion of a string

I'm a total n00b to regex and I have been working for hours on this and cannot get anything to work as I'd like.

I need to remove the last part of a string that occurs after (and including):

Code:

_x_

The remaining characters are all lower case and underscores.

eg.

elaphe_guttata_x_elaphe_guttata_emoryi

needs to be:
elaphe_guttata

My first thoughts are to use preg_replace() with an empty string for the replace part but really struggling with the expression to use. Any help is greatly appreciated

January 21st, 2013, 06:15 PM

requinix

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PHP? You don't need regular expressions: find the offset of the "_x_" and (if it is in fact in there) then only keep everything up to it.

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January 21st, 2013, 08:15 PM

spacebar208

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This is one way:

Code:

$test = "elaphe_guttata_x_elaphe_guttata_emoryi";
$test = preg_replace('/(.+)_x_.*/', '\1', $test);
echo $test;

elaphe_guttata

January 22nd, 2013, 04:05 PM

eeji

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thanks requinix, I didn't think of that, it worked like a charm

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