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- PHP preg_replace()
PHP
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$string = '135.79.246.80';
$pattern = '/(\.\d+)$/';
$replacement = '.x';
echo preg_replace($pattern, $replacement, $string); # 135.79.246.x
135.79.246.x
PHP
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$string = 'April 15, 2003';
$pattern = '/(\w+) (\d+), (\d+)/i';
$replacement = '${1}x,$3';
echo preg_replace($pattern, $replacement, $string); # Aprilx,2003
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PHP
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$string = 'The quick brown fox jumps over the lazy dog.';
$patterns = ['/quick/','/brown/','/fox/'];
$replacements = ['bear','black','slow'];
echo preg_replace($patterns, $replacements, $string); # The bear black slow jumps over the lazy dog.
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PHP
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var_dump( preg_replace('/\.java$/', '', 'mypackage/MyClass') );
var_dump( preg_replace('/\.java$/', '', 'mypackage.java/MyClass') );
var_dump( preg_replace('/\.java$/', '', 'mypackage/MyClass_java') );
var_dump( preg_replace('/\.java$/', '', 'mypackage/MyClass.java') );
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PHP
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var_dump(preg_replace('/http:\/\//', 'https://', 'http://example.com'));
var_dump(preg_replace('/http:\/\//', 'https://', 'http://example.com/api?url=http://example.com'));
var_dump(preg_replace('/^http:\/\//', 'https://', 'http://example.com'));
var_dump(preg_replace('/^http:\/\//', 'https://', 'http://example.com/api?url=http://example.com'));
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