PHPExcel未知字符

Question

我已经按照一些教程看了一些有相同问题的人，但我无法弄清楚如何将这个工作放在我的项目上。

顺便说一下，我正在使用CodeIgniter框架，我的计算机上有Excel 2007。

public function exportExcel(){

    require(APPPATH . 'libraries/toExcel/PHPExcel.php');
    $objPHPExcel = new PHPExcel();

    $objPHPExcel->setActiveSheetIndex(0)
                ->setCellValue('A1', 'Hello');

    // Rename worksheet
    $objPHPExcel->getActiveSheet()->setTitle('Simple');     

    $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');

    header('Content-Type: application/vnd.ms-excel; charset=utf-8');
    header('Content-Disposition: attachment; filename=01simple.xls');
    header('Cache-Control: max-age=0');

    $objWriter->save('php://output');

    exit;
}

这是我的测试代码。每当我下载该函数生成的文件并尝试打开它时，我得到的是：

当我点击“是”时，我会收到：

Answer 1

<强>解决。

ob_end_clean();
ob_start();
$objWriter->save('php://output');

Answer 2

所有php_excel更改了Unknown Creator工作表。 目录application / third_party / phpexcel / PHPExcel / DocumentProperties.php 更改了第43行；

import cplex
from cplex.exceptions import CplexError
import sys



def populatebynonzero(prob):


    my_obj      = [1.0, 0.0, 1.0]
    my_ub       = [1.0] * len(my_obj)
    my_lb       = [0.0] * len(my_obj)
    my_colnames = ["a", "b", "c"]

    prob.objective.set_sense(prob.objective.sense.minimize)
    prob.variables.add(obj = my_obj, ub = my_ub, lb = my_lb ,names = my_colnames)

    #combined constraints
    my_rhs      = [20.0, 30.0, 1.0, 1.0]
    my_rownames = ["c1", "c2", "e1", "e2"]
    my_sense    = "E" * len(my_rownames)
    rows = [0,1,1,2,2,3] 
    cols = [0,1,2,0,1,2]
    vals = [20.0,20.0,30.0,1,1,1]
    prob.linear_constraints.add(rhs = my_rhs, senses = my_sense,names = my_rownames)
    prob.linear_constraints.set_coefficients(zip(rows, cols, vals))     


    """

    # first set of equality constraints: Wx' = c', where W = [[20,0,0],[0,20,30]], x = [a,b,c], c=[20,30]
    my_rhs      = [20.0, 30.0]
    my_rownames = ["c1", "c2"]
    my_sense    = "E" * len(my_rownames)
    rows = [0,1,1] 
    cols = [0,1,2]
    vals = [20.0,20.0,30.0]
    prob.linear_constraints.add(rhs = my_rhs, senses = my_sense,names = my_rownames)
    prob.linear_constraints.set_coefficients(zip(rows, cols, vals))     

    # second set of equality constraints: Vx' = e', where V = [[1,1,0],[0,0,1]], x = [a,b,c], c=[1,1]

    my_rhs      = [1.0, 1.0]
    my_rownames = ["e1", "e2"]
    my_sense    = "E" * len(my_rownames)
    rows = [0,0,1] 
    cols = [0,1,2]
    vals = [1.0,1.0,1.0]
    prob.linear_constraints.add(rhs = my_rhs, senses = my_sense,names = my_rownames)
    prob.linear_constraints.set_coefficients(zip(rows, cols, vals))
    """


def lpex1():
    try:
        my_prob = cplex.Cplex()
        handle = populatebynonzero(my_prob)
        my_prob.solve()
    except CplexError, exc:
        print exc
        return

    numrows = my_prob.linear_constraints.get_num()
    numcols = my_prob.variables.get_num()

    print
    # solution.get_status() returns an integer code
    print "Solution status = " , my_prob.solution.get_status(), ":",
    # the following line prints the corresponding string
    print my_prob.solution.status[my_prob.solution.get_status()]
    print "Solution value  = ", my_prob.solution.get_objective_value()
    slack = my_prob.solution.get_linear_slacks()
    pi    = my_prob.solution.get_dual_values()
    x     = my_prob.solution.get_values()
    dj    = my_prob.solution.get_reduced_costs()
    for i in range(numrows):
        print "Row %d:  Slack = %10f  Pi = %10f" % (i, slack[i], pi[i])
    for j in range(numcols):
        print "Column %d:  Value = %10f Reduced cost = %10f" % (j, x[j], dj[j])

    my_prob.write("lpex1.lp")




    print x, "SOLUTIONS"

lpex1()