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HomeBackend DevelopmentPHP Tutorialphp 将字符串中的连续多个空格转换为一个空格

php 将字符串中的连续多个空格转换为一个空格。

<p>/**</p>* 多个连续空格只保留一个<br />*<br />* @param string $string 待转换的字符串<br />* @return string $string 转换后的字符串<br />*/<br />function merge_spaces($string){<br />	return preg_replace("/\s(?=\s)/","\\1",$string);<br />}


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php怎么将空格转换成nbsp符php怎么将空格转换成nbsp符Apr 25, 2022 pm 08:30 PM

方法:1、用str_replace(),语法“str_replace(" ","&nbsp;",$str)”;2、用preg_replace()配合正则表达式,语法“preg_replace('/\s+/',"&nbsp;",$str)”。

php怎么将数值后面的零去掉php怎么将数值后面的零去掉May 30, 2022 pm 07:36 PM

两种去除方法:1、使用rtrim()函数,语法“rtrim(数值,"0")”,可去除数值后面连续的零。2、用substr_replace(),语法“substr_replace(数值,'', -位置值)”,可从指定位置开始将零替换为空字符。

php字符串有没有下标php字符串有没有下标Apr 24, 2022 am 11:49 AM

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

php怎么读取字符串后几个字符php怎么读取字符串后几个字符Apr 22, 2022 pm 08:31 PM

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

php怎么将小数点转为百分比php怎么将小数点转为百分比Apr 28, 2022 pm 08:51 PM

php将小数点转为百分比的方法:1、利用“*”运算符将小数乘以100,语法“小数 * 100”,可将小数转为百分值;2、使用字符串拼接符“.”将百分值和“%”符拼接在一起,形成百分比字符串即可,语法“百分值."%"”。

php怎么替换nbsp空格符php怎么替换nbsp空格符Apr 24, 2022 pm 02:55 PM

方法:1、用“str_replace("&nbsp;","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\&nbsp\;||\xc2\xa0)/","其他字符",$str)”语句。

怎么将多个php数组转成一个json数据怎么将多个php数组转成一个json数据May 26, 2022 pm 04:18 PM

转换方法:1、使用“array_merge_recursive(数组1,数组2,数组3...)”语句将多个数组合并为一个数组;2、使用json_encode()将合并后的数组转为json数据,语法“json_encode(合并后的数组)”。

php怎么去掉指定字符之后的内容php怎么去掉指定字符之后的内容May 27, 2022 pm 06:12 PM

两种方法:1、用“substr_replace($str,"",strpos($str,"指定字符")+1)”语句,将指定字符位置后的内容替换为空字符;2、用“substr($str,0,strpos($str,"指定字符")+1)”语句。

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