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Today, I would like to share with you how php removes the tab blank space in the first place of the string. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article.

In php, you can use the ltrim () function to remove the tab white space character at the beginning of a string, with the syntax "ltrim (string)"; when you pass only one parameter to the ltrim () function that specifies the string to be checked, you can delete the white space character at the beginning of the string (for example, space, tab tab, newline character, etc.).

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In php, you can use the ltrim () function to remove the tab white space character from the first bit of a string.

The ltrim () function removes white space characters or other predefined characters from the beginning of a string.

Blank characters include: spaces, tabs tab, newline characters, and other white space characters.

The ltrim () function accepts two parameters:

The ltrim (string,charlist) parameter is required to describe string. Specifies the string to check. Charlist

Optional. Specifies which characters are removed from the string.

If this parameter is omitted, all the following characters are removed:

"\ 0"-NULL

"\ t"-tab tab

"\ n"-Line break

"\ x0B"-Vertical Tab

"\ r"-enter

""-Spac

Return value: returns the modified string.

Example: remove the tab space character (tab) from the first bit of the string

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