问题
为什么我得到错误的结果?我怎样才能得到理想的结果?
输入文件
vulture (wing)
tabulations: one leg; two legs; flying
father; master; patriarch
mat (box)
pedistal; blockade; pilar
animal belly (oval)
old style: naval
jackal's belly; jester slope of hill (arch)
key; visible; enlightened
代码的两个版本,有问题
版本1:
<?php
$filename = "fakexample.txt";
$file = fopen($filename, "rb");
$myFile = fread($file, filesize($filename));
//PLEASE NOTE THAT $STARTSAFE IS IN PLACE IN THIS VERSION AND NOT IN THE NEXT
function get_between($startString, $endString, $myFile, $startSafe, $endSafe){
//CHANGES WILL START HERE
if($startSafe = 0){
$startStringSafe = $startString;
}
elseif($startSafe = 1){
$startStringSafe = preg_quote($startString, '/');
}
//AND END HERE
if($endSafe = 0){
$endStringSafe = $endString;
}
elseif($endSafe = 1){
$endStringSafe = preg_quote($endString, '/');
}
//non-greedy match any character between start and end strings.
//s modifier should make it also match newlines.
preg_match_all("/$startStringSafe(.*?)$endStringSafe/m", $myFile, $matches);
return $matches;
}
$list = get_between("^", ")", $myFile, 0, 1);
foreach($list[1] as $list){
echo $list."\n";
}
?>
此代码不返回任何内容。
第2版:
<?php
$filename = "fakexample.txt";
$file = fopen($filename, "rb");
$myFile = fread($file, filesize($filename));
//PLEASE NOTE THAT $STARTSAFE IS NOT IN PLACE IN THIS VERSION
function get_between($startString, $endString, $myFile, $startSafe, $endSafe){
//CHANGES START HERE
$startStringSafe = $startString;
//AND END HERE
if($endSafe = 0){
$endStringSafe = $endString;
}
elseif($endSafe = 1){
$endStringSafe = preg_quote($endString, '/');
}
//non-greedy match any character between start and end strings.
//s modifier should make it also match newlines.
preg_match_all("/$startStringSafe(.*?)$endStringSafe/m", $myFile, $matches);
return $matches;
}
$list = get_between("^", ")", $myFile, 0, 1);
foreach($list[1] as $list){
echo $list."\n";
}
?>
返回vulture (wing mat (box animal belly (oval jackal's belly; jester slope of hill (arch
。
所需的输出
vulture mat animal belly jackal's belly; jester slope of hill
标记差异
vulture **(wing** mat **(box** animal belly **(oval** jackal's belly; jester slope of hill **(arch**