php正则替换
$string = 'April 15, 2003';$pattern = '/(\w+) (\d+), (\d+)/i';
$replacement = '${1}1,\3';
//$replacement = '${1}1,$3';
//$replacement = '${1}1,{3}';
echo preg_replace($pattern, $replacement, $string);
echo '<br/>';
//-----------------------------
$string = 'The quick brown fox jumped over the lazy dog.';
$patterns = array();
$patterns = '/quick/';
$patterns = '/brown/';
$patterns = '/fox/';
$replacements = array();
$replacements = 'bear';
$replacements = 'black';
$replacements = 'slow';
echo preg_replace($patterns, $replacements, $string);
echo '<br/>';
//---------------------------------
//$d = $db->select('select * from <{:task}> limit 2');
self::$_sql = preg_replace('/<{:\s*(.*?)\s*}>/', $this->_prefix . '\1', $sql);
$this->_res = mysql_query(self::$_sql, $this->_db);
//---------------------------------
if (preg_match('/^p-(\d+)$/', $segment3, $m)) {
$page = intval($m);
}
else if (preg_match('/^\d+$/', $segment3)) {
$task_type = intval($segment3);
if (preg_match('/^p-(\d+)$/', $setment4, $m2)) {
$page = intval($m2);
}
}
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