How to remove "-" character from php string

3 methods: 1. Use "str_replace("-",'',$str)" to replace the "-" character with a null character; 2. Use "preg_replace("/-/"," ",$str)" executes a regular expression to find the "-" character and remove it; 3. Use preg_filter() to remove it.

The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer

Remove the php string "-" character method

Method 1: Use str_replace() or str_replace() function

str_ireplace() and str_replace use new A string replaces a specific string specified in the original string. str_replace is case-sensitive, while str_ireplace() is not case-sensitive. The syntax of the two is similar.

Just replace the "-" characters with the empty characters''.

"; echo "去掉'-'字符后：
"; echo str_replace("-",'',$str)."
"; echo str_ireplace("-",'',$str)."
"; ?>

Method 2: Use the preg_replace() function

The preg_replace() function can be used with regular expressions to find all "- ” character and replace it with the empty character ''.

"; echo "去掉'-'字符后：".preg_replace("/-/", "", $str)."
"; ?>

Method 3: Use the preg_filter() function

Similarly, the preg_filter() function works with regular expressions to find all " -" character and replace it with the empty character ''.

"; echo "去掉'-'字符后：".preg_filter("/-/", "", $str)."
"; ?>

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