в 10:37, 26 мая 2010

2010-05-26T10:37:30Z

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2010-05-26T07:07:40Z

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==Calculating average word length==



<source lang="html4strict">

<?php
$word_count = $word_length = 0;
if ($fh = fopen("novel.txt","r")) {
while (! feof($fh)) {
if ($s = fgets($fh)) {
$words = preg_split("/\s+/",$s,-1,PREG_SPLIT_NO_EMPTY);
foreach ($words as $word) {
$word_count++;
$word_length += strlen($word);
}
}
}
}
print sprintf("The average word length over %d words is %.02f characters.",
$word_count,
$word_length/$word_count);
?>

</source>

==Discarding empty elements with preg_split()==



<source lang="html4strict">

<?
$text=<<<TEXT
"asdf.asdf,asdf!asdf
TEXT;
$words = preg_split("/[",.!\s]/", $text, -1, PREG_SPLIT_NO_EMPTY);
print "There are " . count($words) ." words in the text.";
?>

</source>

==How preg_split() can be used:==



<source lang="html4strict">

<?php
$s = "a , bc ,asdf";
var_dump (preg_split ("/[ ,]/", $s));
?>

</source>

==Limiting the number of returned elements with preg_split()==



<source lang="html4strict">

<?
$sea_creatures = "A;B, C,D, E; F";
$creature_list = preg_split("/, ?/",$sea_creatures, 3);
print "The last element is $creature_list[2]";
?>

</source>

==Parsing a date with preg_split()==



<source lang="html4strict">

<?php $ar = preg_split("/[- :]/",$date);
var_dump($ar);
?>

</source>

==preg_split() Flags==



<source lang="html4strict">

Reference Number Value

PREG_SPLIT_NO_EMPTY Causes empty substrings to be discarded.

PREG_SPLIT_DELIM_CAPTURE Causes any references inside pattern to be captured and returned as part of the function"s output.

PREG_SPLIT_OFFSET_CAPTURE Causes the position of each substring to be returned as part of the function"s output (similar to PREG_OFFSET_CAPTURE in preg_match()).

</source>

==preg_split() function operates like split(), except that regular expressions are accepted as input parameters for pattern.==



<source lang="html4strict">

Its syntax is: array preg_split (string pattern, string string [, int limit [, int flags]])
If limit is specified, then only limit number of substrings are returned.

<?
$user_info = "+J+++G+++++w";
$fields = preg_split("/\+{1,}/", $user_info);
while ($x < sizeof($fields)) :
print $fields[$x]. "<br>";
$x++;
endwhile;
?>

</source>

==preg_split.php==



<source lang="html4strict">

<?php
$delimitedText = "+A+++G+++++++++++C";
$fields = preg_split("/\+{1,}/", $delimitedText);
foreach($fields as $field) echo $field."<br />";
?>

</source>

==Using preg_split()==



<source lang="html4strict">

<?
$sea_creatures = "A;B, C,D, E; F";
$creature_list = preg_split("/[,;] ?/",$sea_creatures);
print "Would you like some $creature_list[2]?";
?>

</source>

==Using preg_split() to Break Up Strings==



<source lang="html4strict">

<?
$text = "a, o, p";
$fruitarray = preg_split( "/, | and /", $text );
print "<pre>\n";
print_r( $fruitarray );
print "</pre>\n";
?>

</source>

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в 10:37, 26 мая 2010

Admin: 1 версия