PHP ltrim: Strip Whitespaces from the Beginning of a String (original) (raw)

Summary: in this tutorial, you’ll learn how to use the PHP ltrim() function to remove whitespace characters or other characters from the beginning of a string.

Introduction to the PHP ltrim() function #

The PHP ltrim() function removes the whitespace characters or other characters from the beginning of a string.

Here’s the syntax of the ltrim() function:

ltrim ( string <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>s</mi><mi>t</mi><mi>r</mi><mi>i</mi><mi>n</mi><mi>g</mi><mo separator="true">,</mo><mi>s</mi><mi>t</mi><mi>r</mi><mi>i</mi><mi>n</mi><mi>g</mi></mrow><annotation encoding="application/x-tex">string , string </annotation></semantics></math>string,stringcharacters = " \n\r\t\v\0" ) : stringCode language: PHP (php)

The ltrim() has the following parameters:

$string is the input string
$characters is one or more characters that you want to remove from the beginning of the string.

By default, the ltrim() function strips the characters in the list " \n\r\t\v\0" from the beginning of the string.

If you want to strip other characters, you can specify them in the $characters argument.

To remove a set of characters, you can use the .. syntax. For example, to remove all characters from a to z, you pass the the following string to the $characters argument:

'a..z'Code language: PHP (php)

It’s important to notice that the ltrim() function doesn’t modify the input string ($string). Instead, it returns a new string with the characters specified in the $characters removed.

PHP ltrim() function examples #

Let’s take several examples of using the ltrim() function.

1) Using the PHP ltrim() function to remove whitespace characters #

This example uses the ltrim() function to strip all the space characters from the beginning of a string:

`<?php

$title = ' PHP tutorial'; cleantitle=ltrim(clean_title = ltrim(cleantitle=ltrim(title);

var_dump($clean_title);`Code language: PHP (php)

Try it

Output:

string(12) "PHP tutorial"Code language: PHP (php)

2) Using the PHP ltrim() function to remove other characters #

The following example uses the ltrim() function to remove the slash (/) at the beginning of a string:

`<?php $uri = '/php-ltrim'; newuri=ltrim(new_uri = ltrim(newuri=ltrim(uri, '/');

echo $new_uri;`Code language: PHP (php)

Try it

Output:

php-ltrimCode language: PHP (php)

Summary #

Use the PHP ltrim() function to remove the whitespace characters or other characters from the beginning of a string.

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