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[SOLVED] regular expression


TiloW

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I need to search a string for certain substrings, here are some examples of substrings i'd like to find in my string:

{$content}
{$title}
{$moduleLeft}
{$moduleRight}

so i created a pattern:

{$[A-Z|a-z]+}

then recognized i had to escape some chars ..correct?^^

\{\$[A-Z|a-z]+\}

It doesn't work properly but just finds the first occurence - im using the function ereg:

ereg('{\$[A-Z|a-z]+}', $content, $positions);

The array $positions should store all of thoose substrings.

But $positions always consists of only 1 element. ($positions[1] is always set, no other elements are set)

If i delete the first match in $content, the value of $positions[1] changes accordingly - which is why i'm not sure whether regular expression or something else is incorrect..

 

I'll appreciate any help  :)

 

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Do you mean this ?

<?php
$content = '{$content}
{$title}
{$moduleLeft}
{$moduleRight}';
preg_match_all('/\{\$[a-z]+\}/i', $content, $result);
foreach($result[0] as $Item)
{
echo $Item;
}
?>

 

if you want just the word ie title

then

change the RegEx to

'/\{\$([a-z]+)\}/i'

and

$result[0] to $result[1]

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Okay.. my example input was wrong.. did you test it with your input.. and was the result what you expected ?

 

EDIT: would this be the correct response

{$title}{$content}

to your input of

$content = '<html><head><title>{$title}</title></head><body>{$content}</body></html>';

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$content = "<html><head><title>{$title}</title></head><body>{$content}</body></html>";
ereg('{\$[A-Z|a-z]+}', $content, $positions);

 

after this the array $positions should consist of 2 elements:

$positions[1] == "{$title}"
$positions[2] == "{$content}"

 

..but for some strange reason ereg only stores the first occurrence (in this case "{$title}") in the array.. what do i have to change to store all occurrences in $positions?

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Like this (remember arrays start from 0 not 1)

<?php
$content = '<html><head><title>{$title}</title></head><body>{$content}</body></html>';
preg_match_all('/\{\$[a-z]+\}/i', $content, $positions);
$positions =$positions[0];
echo $positions[0];
echo $positions[1];
?>

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even if i've got more than 2 matches only the first one is strored

the first index of the resulting array is 1 ..take a look at function ereg

 

If matches are found for parenthesized substrings of pattern and the function is called with the third argument regs , the matches will be stored in the elements of the array regs .

 

    $regs[1] will contain the substring which starts at the first left parenthesis; $regs[2] will contain the substring starting at the second, and so on. $regs[0] will contain a copy of the complete string matched.

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