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<?php $replacements = array( '[PEDIDO]' => 123, '[NOME]' => 'Bruno Augusto', '[VALOR]' => 69.00, '[FRETE]' => 0, '[DESCONTO]' => 69.00, '[TOTAL]' => 'It\'s FREE!', ); //$msg = preg_replace( '/\[\w+\]/', ); var_dump( array_map( 'preg_quote', array_keys( $replacements ) ) );
Output for git.master, git.master_jit, rfc.property-hooks
array(6) { [0]=> string(10) "\[PEDIDO\]" [1]=> string(8) "\[NOME\]" [2]=> string(9) "\[VALOR\]" [3]=> string(9) "\[FRETE\]" [4]=> string(12) "\[DESCONTO\]" [5]=> string(9) "\[TOTAL\]" }

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