<?php
	function prepareCondReadInterrogacao($condicao) {
	    $val = explode(",", $condicao);
	    $temp = "";
	    foreach ($val as $value) {
	        if (!in_array(trim($value), array('AND','OR'))) {
	            $val2 = explode("=", $value);
	            $val2[1] = " ?";
	            $value = implode("=", $val2);
	        }
	        $temp .= $value . " ";
	    }
 
	    return $temp;
	}
 
	print_r( prepareCondReadInterrogacao( 'codigo = 1, AND, nome = 2, OR, secao = 1' ) );

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