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Removal method: 1. Use the "substr(variable,0,-1)" statement to cut off the last character of the English string in reverse order; 2. Use "mb_substr(variable,0,-1, "Character encoding ")" statement can delete the last character of the Chinese string; 3. Use the "rtrim(variable, "specified character")" statement.
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
Remove the variables in php The last character
Method 1: Use the substr() function
Use the substr() function to cut off the last character in reverse order ( This function cannot be used with Chinese characters).
substr($arr_str, 0, -1)
Example:
<?php $num = 12345; $str = substr($num, 0, -1) ; echo $num; var_dump($str); $str = "abcdef"; echo $str; $str = substr($str, 0, -1); var_dump($str); ?>
Method 2: Use mb_substr() function
mb_substr( ) function is used the same as the substr() function, just cut off the last character in reverse order; but this function can be used for Chinese characters.
<?php header('content-type:text/html;charset=utf-8'); $num = 12345; $str = mb_substr($num, 0, -1) ; echo $num; var_dump($str); $str = "php中文网啦啦"; echo $str; $str = mb_substr($str, 0, -1,"utf-8"); var_dump($str); ?>
3. Use the rtrim() function
rtrim — delete the blank characters (or other characters) at the end of the string
rtrim($arr_str, "指定字符")
Example:
<?php header('content-type:text/html;charset=utf-8'); $num = "1,2,3,4,5,6,"; $str = rtrim($num, ",") ; echo $num; var_dump($str); $str = "php中文网啦啦"; echo $str; $str = rtrim($str,"啦"); var_dump($str); ?>
Explanation: The rtrim() function will delete consecutive characters on the right.
Recommended learning: "PHP Video Tutorial"
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