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remove whitespace from string php

$str = "


Hello World!


";
echo "With trim: " . trim($str);
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php remove all whitespace from a string

//remove all white spaces from a string
$whatonearth=preg_replace('/s/','',"what o n   ear th");
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PHP rtrim — Strip whitespace (or other characters) from the end of a string

<?php

$text = "		These are a few words :) ...  ";
$binary = "x09Example stringx0A";
$hello  = "Hello World";
var_dump($text, $binary, $hello);

print "
";

$trimmed = rtrim($text);
var_dump($trimmed);

$trimmed = rtrim($text, " 	.");
var_dump($trimmed);

$trimmed = rtrim($hello, "Hdle");
var_dump($trimmed);

// trim the ASCII control characters at the end of $binary
// (from 0 to 31 inclusive)
$clean = rtrim($binary, "x00..x1F");
var_dump($clean);

?>
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