regexp problem

[Gordan]

Hi

I have an array with following values:
419;
20;
19;20;21;
18;30;
17;20;25;
16;26;
16;17;20;21;22;34

I would like to find out in how many keys there is "19;". If I simply search for
"19;" it will also match "419;" witch is of course wrong. I tried to write a
regexp but can't seem to pull it off. :-( Could somebody please assist me with
that regexp

thanks
gordan

[d]

"Gordan" <go*********@torkul.hr> wrote in message
news:dq**********@news1.xnet.hr...

Hi

I have an array with following values:
419;
20;
19;20;21;
18;30;
17;20;25;
16;26;
16;17;20;21;22;34

I would like to find out in how many keys there is "19;". If I simply
search for "19;" it will also match "419;" witch is of course wrong. I
tried to write a regexp but can't seem to pull it off. :-( Could somebody
please assist me with that regexp

thanks
gordan

Why are you using a regular expression? Also, how are you iterating through
your array?

dave

[Andrew]

Gordan wrote:

Hi

I have an array with following values:
419;
20;
19;20;21;
18;30;
17;20;25;
16;26;
16;17;20;21;22;34

I would like to find out in how many keys there is "19;". If I simply search for
"19;" it will also match "419;" witch is of course wrong. I tried to write a
regexp but can't seem to pull it off. :-( Could somebody please assist me with
that regexp

Someone will probably come up with a better regex but try:

<?php

$foo = array(
"20;",
"419;",
"19;20;21;",
"20;19;21;",
"21;20;19;",
"19;",
"194;",
"18;30;",
"17;20;25;",
"16;26;",
"16;17;20;21;22;34"
);

foreach ($foo as $bar) {
if (preg_match("/^19;|;19;/", $bar)) {
echo $bar."<br>\n";
}
}

?>

This matches:
19;20;21;
20;19;21;
21;20;19;
19;

--
Andrew @ Rockface
np: Naked Raygun - Metastasis [stopped]
www.rockface-records.co.uk

[d]

"Andrew @ Rockface" <an****@rockface-records.co.uk> wrote in message
news:dq**********@nwrdmz02.dmz.ncs.ea.ibs-infra.bt.com...

Gordan wrote:

Hi

I have an array with following values:
419;
20;
19;20;21;
18;30;
17;20;25;
16;26;
16;17;20;21;22;34

I would like to find out in how many keys there is "19;". If I simply
search for "19;" it will also match "419;" witch is of course wrong. I
tried to write a regexp but can't seem to pull it off. :-( Could somebody
please assist me with that regexp
Someone will probably come up with a better regex but try:

<?php

$foo = array(
"20;",
"419;",
"19;20;21;",
"20;19;21;",
"21;20;19;",
"19;",
"194;",
"18;30;",
"17;20;25;",
"16;26;",
"16;17;20;21;22;34"
);

foreach ($foo as $bar) {
if (preg_match("/^19;|;19;/", $bar)) {
echo $bar."<br>\n";
}
}

/(?:^|;)19;/ will do it, too.
?>

This matches:
19;20;21;
20;19;21;
21;20;19;
19;

--
Andrew @ Rockface
np: Naked Raygun - Metastasis [stopped]
www.rockface-records.co.uk

[Gordan]

THANK YOU both it works perfectly :-)

gordan

[Rich]

"Gordan" <go*********@torkul.hr> wrote in message
news:dq**********@news1.xnet.hr...

Hi

I have an array with following values:
419;
20;
19;20;21;
18;30;
17;20;25;
16;26;
16;17;20;21;22;34

I would like to find out in how many keys there is "19;". If I simply
search for "19;" it will also match "419;" witch is of course wrong. I
tried to write a regexp but can't seem to pull it off. :-( Could somebody
please assist me with that regexp

thanks
gordan

To count the number of times 19 occurs, something like this would work.

<?
$myarray = array(
"419;",
"20;",
"19;20;21;",
"18;30;",
"17;20;25;",
"16;26;",
"16;17;20;21;22;34"
);

$num = 19;

echo "There are/is ".count(preg_grep("/(?:^|;)$num;/", $myarray))."
occurrence(s) of $num.";
?>
Rich