在PHP中指定字符后切字符串 [英] Cut string after specified character in php
问题描述
在这种情况下，我尝试在出现指定字符后剪切文本：
I try to cut a text after the occurence of a specified character, in this case:
"
文本示例为：
...text?" Text,
我尝试了以下操作：
$pos2 = strpos($title, '"');
if ($pos2 == true) {
$header_title = substr($title, 0, $pos2);
{
但是它总是削减 也是。我在$ pos2上加了数字，但一无所获。如何剪切指定的字符？
But it always cuts ", too. I messed around with adding numbers to $pos2 but couldn't figure it out. How can I cut after the specified character?
推荐答案
strpos（）命令需要3个参数
1）变量
2）起始列和
3）字符数
如果只使用 substr（$ title，$ pos2），您将从pos2列中的文本获取到字符串的末尾。
If you just use substr($title,$pos2) you get the text from the pos2 column to the end of the string.
<?php
$title = 'before"after';
$pos2 = strpos($title, '"');
if ($pos2 !== false) {
$header_title = substr($title,0, $pos2+1);
} else {
// you might want to set $header_title to something in here
$header_title = 'ELSE';
}
echo $header_title;
结果
before"
还要测试不等于false as strpos如果找不到要搜索的字符，则返回FALSE
Also test for not equal false as strpos returns FALSE if it does not find the character you are searching for
我的本地Apache / PHP
After all the discussion below I ran it on my local Apache/PHP
<?php
$title = 'before"after';
$pos2 = strpos($title, '"');
if ($pos2 !== false) {
$header_title = substr($title,0,$pos2+1);
} else {
// you might want to set $header_title to something in here
$header_title = 'ELSE';
}
?>
<!DOCTYPE html>
<html>
<head>
<title><?php echo $header_title;?></title>
</head>
<body>
<div> Ello Wurld</div>
</body>
</html>
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