php 如何从php字符串中删除第一个单词
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how to remove first word from a php string
提问by Monkeyalan
I'd like to remove the first word from a string using PHP. Tried searching but couldn't find an answer that I could make sense of.
我想使用 PHP 从字符串中删除第一个单词。尝试搜索，但找不到我能理解的答案。
eg: "White Tank Top" so it becomes "Tank Top"
例如：“白色背心”所以它变成了“背心”
Thanks
谢谢
回答by amosrivera
回答by Alex
You can use the preg_replacefunction with the regex ^(\w+\s)that will match the first word of a string per se:
您可以将该preg_replace函数与^(\w+\s)将匹配字符串本身的第一个单词的正则表达式一起使用：
$str = "White Tank Top";
$str = preg_replace("/^(\w+\s)/", "", $str);
var_dump($str); // -> string(8) "Tank Top"
回答by symcbean
function remove_word($sentence)
{
$words=array_shift(explode(' ', $sentence));
return implode(' ', $words);
}
?
?
回答by PeeHaa
$string = 'White Tank Top';
$split = explode(' ', $string);
if (count($split) === 1) {
// do you still want to drop the first word even if string only contains 1 word?
// also string might be empty
} else {
// remove first word
unset($split[0]);
print(implode(' ', $split));
}
回答by Chirag Pipariya
function remove_word($sentence)
{
$exp = explode(' ', $sentence);
$removed_words = array_shift($exp);
if(count($exp)>1){
$w = implode(' ', $exp);
}else{
$w = $exp[0];
}
return $w;
}
Try this function i hope it's work for you .
试试这个功能，我希望它对你有用。
回答by mickmackusa
If you are not guaranteed to have a space in your string, be careful to choose a technique that won't fail on such cases.
如果不能保证字符串中有空格，请小心选择不会在这种情况下失败的技术。
If using explode()be sure to limit the explosions for best efficiency.
如果使用explode()一定要限制爆炸以获得最佳效率。
示范：
$strings = ["White", "White Tank", "White Tank Top"];
foreach ($strings as $string) {
echo "\n{$string}:";
echo "\n-\t" , substr($string, 1 + (strpos($string, ' ') ?: -1));
$explodeOnce = explode(' ', $string, 2);
echo "\n-\t" , end($explodeOnce);
echo "\n-\t" , substr(strstr($string, " "), 1);
echo "\n-\t" , ltrim(strstr($string, " "));
echo "\n-\t" , preg_replace('~^\S+\s~', '', $string);
}
Output:
输出：
White:
- White
- White
- // strstr() returned false
- // strstr() returned false
- White
White Tank:
- Tank
- Tank
- Tank
- Tank
- Tank
White Tank Top:
- Tank Top
- Tank Top
- Tank Top
- Tank Top
- Tank Top
My preference is the regex technique because it is stable in all cases above and is a single function call. Note that there is no need for a capture group because the fullstring match is being replaced. ^matches the start of the string, \S+matches one or more non-whitespace characters and \smatches one whitespace character.
我更喜欢正则表达式技术，因为它在上述所有情况下都是稳定的，并且是单个函数调用。请注意，不需要捕获组，因为正在替换全字符串匹配。^匹配字符串的开头，\S+匹配一个或多个非空白字符并\s匹配一个空白字符。
