Remove substring from string, where only the beginning and end of the string are known

Question

I have a variable in my PHP code where its equal to a stored string. A small portion of this string is taken and used as a preview on a different page. On occasion there will be Javascript in that string, how could I say the following:

Pseudocode:
if stringVar contains "<script"
then remove the substring starting at "<script" and ending at "/script>"

Are you sure that within that text, you will NEVER find another instance of "<script", or "/script>" before the actual ends? If you are, it sounds like this would be trivial to do with a regex replace. P.S. This sounds suspiciously like trying to parse HTML - if that's the case, don't do it; use an XML parser instead. — Nightfirecat
– Nightfirecat, Commented Nov 8, 2011 at 1:05

nickb · Accepted Answer · 2011-11-08 01:26:40Z

1

If you're just getting rid of script tags:

$result = preg_replace('%<script>.*</script>%i', '', $subject);

answered Nov 8, 2011 at 1:26

nickb

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Tony Hopkinson · Accepted Answer · 2011-11-08 01:26:13Z

0

strpos function returns the position of one string in another,

so your start is strpos($SomeString,"<script")

end is strpos($SomeString,"/script>") + 7

after that it's just substr to get everything before and after.

Note this will not work if <script can contains the <Script /Script> tags...

edited Nov 8, 2011 at 1:26

answered Nov 8, 2011 at 1:22

Tony Hopkinson

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