PHP：括号交互为'）'的preg_replace问题

时间：2019-04-29 23:18:02

标签： php regex preg-replace

我试图从laravel复制刀片以进行学习，但我遇到了问题

使用preg_replace创建解析器时，除与方括号进行某些交互外，其他所有操作均正常进行； '）'

ThisIsGonnaBeParsed.php 

@if ($user->loggedIn() || true)

    <p>welcome {{$user->name}}</p>

@endif

@if (true)

    <p>hello</p>

@endif

样式=>替换

        '/{{(.+?)}}/s'              => '<?php echo \1; ?>',
        '/@if(\s|)\((.+?)\)/s'      => '<?php if (\2): ?>',
        '/@endif/'                  => '<?php endif; ?>'
如您所见，

除了存储在方括号之间的内容外，所有内容均已替换。但是结果出了问题。

完整结果

<?php if ($user->loggedIn(): ?> || true)

    <p>welcome <?php echo $user->name; ?></p>

<?php endif; ?>

<?php if (true): ?>

    <p>hello</p>

<?php endif; ?>

出现错误的部分

<?php if ($user->loggedIn(): ?> || true)

如您所见，一旦遇到），便将所有内容从该点扔到了字符串的后面

我实际想要的结果

<?php if ($user->loggedIn() || true): ?>

我尝试了谷歌搜索，但找不到任何结果

1 个答案:

答案 0 :(得分：1)

您的问题是您的内括号匹配.+?不是贪婪的，所以它在第一个)处停止，而第一个$user->loggedIn()在s的末尾。您可以通过使用贪婪匹配来解决此问题，但还需要删除.修饰符，该修饰符允许)匹配换行符，否则将使其与if (true)匹配if的结尾。这将意味着您的$replacements = array( '/{{(.+?)}}/' => '<?php echo $1; ?>', '/@if\s*\((.+)\)/' => '<?php if ($1): ?>', '/@endif/' => '<?php endif; ?>' ); echo preg_replace(array_keys($replacements), $replacements, $code); 条件不能超过换行符，但是如果可以，那么应该可以：

<?php if ($user->loggedIn() || true): ?>

    <p>welcome <?php echo $user->name; ?></p>

<?php endif; ?> 

<?php if (true): ?> 

    <p>hello</p> 

<?php endif; ?>

输出：

from tkinter import *
import tkinter.messagebox
import re
#Tkinter Basics______________________________________________
root = Tk()
#Files to open_______________________________________________
Reagent_To_List_file = open("Reagent_To_List.txt","w")

topFrame = Frame(root)
topFrame.pack()
bottomFrame = Frame(root)
bottomFrame.pack(side=BOTTOM)

#Class_____________________________________

class Reagent:
    def __init__(self, Nickname, Name, Part_Num, Lot_Num, Expiration,         
Manufacteur, ):
    self.Nickname = Nickname
    self.Name = Name
    self.Part_Num = Part_Num
    self.Lot_Num = Lot_Num
    self.Expiration = Expiration
    self.Manufacteur = Manufacteur

#Functions_________________________________

class New_Reagent_Button_1:

    def __init__(self, master):
        frame = Frame(master)
        frame.pack()

        self.New_Reagent_button =Button(topFrame, text="New Reagent",fg="Black", width=75, height=3, relief=RAISED, bd=18,command = self.new_Reg)
    self.New_Reagent_button.grid(row=0, column=0)



def new_Reg(self):
    newwin = Toplevel(root)
    newwin.geometry("450x500")

    Enter_Nick = Label(newwin, text = "Enter Nickname: ", bd = 25)
    Enter_Nick.grid(row=0, column=0)
    x = Entry(newwin, bd = 5, width=30)
    x.grid(row=0, column=1)

    Enter_Chem_Name = Label(newwin, text="Chemical Name: ", bd = 25)
    Enter_Chem_Name.grid(row=1, column=0)
    x_1 = Entry(newwin, bd=5, width=30)
    x_1.grid(row=1, column=1)

    Enter_Part = Label(newwin, text="Part Number: ", bd=25)
    Enter_Part.grid(row=2, column=0)
    x_2 = Entry(newwin, bd=5, width=30)
    x_2.grid(row=2, column=1)

    Enter_Lot = Label(newwin, text = "Lot Number: ", bd= 25)
    Enter_Lot.grid(row=3, column=0)
    x_3 = Entry(newwin, bd=5, width=30)
    x_3.grid(row=3, column=1)

    Enter_Exp = Label(newwin, text = "Expiration Date: ", bd= 25)
    Enter_Exp.grid(row=4, column=0)
    x_4 = Entry(newwin, bd=5, width=30)
    x_4.grid(row=4, column=1)

    Enter_Manu = Label(newwin, text = "Manufacteur: ", bd= 25)
    Enter_Manu.grid(row=5, column=0)
    x_5 = Entry(newwin, bd=5, width=30)
    x_5.grid(row=5, column=1)


    def Done_Save(x):
        input = x.get()
        input_1 = x_1.get()
        input_2 = x_2.get()
        input_3 = x_3.get()
        input_4 = x_4.get()
        input_5 = x_5.get()

        Reagent_To_List = (Reagent(x,x_1, x_2, x_3, x_4, x_5))
        Reagent_To_List_file.write(str(input + ", "))
        Reagent_To_List_file.write(str(input_1 + ", "))
        Reagent_To_List_file.write(str(input_2 + ", "))
        Reagent_To_List_file.write(str(input_3 + ", "))
        Reagent_To_List_file.write(str(input_4 + ", "))
        Reagent_To_List_file.write(str(input_5))
        Reagent_To_List_file.write("\n")
        Reagent_To_List_file.flush()

    Save_New_Reg = Button(newwin, text="Done/Save", bd=5, height=2, width= 8, command= lambda: Done_Save(x))
    Save_New_Reg.grid(row=6, column=0)

    Done_New_Reg = Button(newwin, text ="Exit", bd = 5, height = 2, width = 8, command = newwin.destroy)
    Done_New_Reg.grid(row = 6, column = 2)

    newwin.mainloop()


class Search_Button:

def __init__(self, master):
    frame = Frame(master)
    frame.pack()

    self.Search_button =Button(topFrame, text="Search For Reagent", fg="Black", width=75, height=3, relief=RAISED, bd=18, command = self.Search)
    self.Search_button.grid(row=1, column=0)

def Search(self):

    newwin = Toplevel(root)
    newwin.geometry("610x400")

    Enter_Search = Label(newwin, text="Enter\n Nickname: ", bd=25)
    Enter_Search.grid(row=0, column=0)
    global x_search_nick
    x_search_nick = Entry(newwin, bd=5, width=50)
    x_search_nick.grid(row=0, column=1)

    Enter_Search = Label(newwin, text="Enter\n Chemical Name: ", bd=25)
    Enter_Search.grid(row=3, column=0)
    global x_search_name
    x_search_name = Entry(newwin, bd=5, width=50)
    x_search_name.grid(row=3, column=1)

    Enter_Search = Label(newwin, text="Enter\n Part #: ", bd=25)
    Enter_Search.grid(row=6, column=0)
    global  x_search_part
    x_search_part = Entry(newwin, bd=5, width=50)
    x_search_part.grid(row=6, column=1)

    Done_New_Search = Button(newwin, text = "Exit", bd = 5, height = 2, width = 8, command = newwin.destroy)
    Done_New_Search.grid(row = 9, column = 2)

    B_Search = Button(newwin, text="Search", bd=5, height=2, width=8, command= self.Search_Function)
    B_Search.grid(row=9, column=0)






def Search_Function(self):

    newwin = Toplevel(root)
    newwin.geometry("550x700")

    Results_Header = Label(newwin, text="Search Results", font=("Times New Roman", 16), height=5, width=10)
    Results_Header.grid(row=0, column=1)
    Search_Results_List = Listbox(newwin, bd=3, height=20, width=50)
    Search_Results_List.grid(row=10, column=4)

        regex_nick = (x_search_nick.get()) + r"([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+)"
    pattern_nick = re.compile(regex_nick)

    with open("Reagent_To_List.txt", "r") as f:
        contents = f.read()
        matches_nick = pattern_nick.finditer(contents)

        for match_nick in matches_nick:
            print(match_nick)
            return (match_nick)

            if match_nick.group(1) == x_search_nick.get():
                Search_Results_List.insert(1, x_search_nick.get() + ", " + match_nick.group(2) + ", " + match_nick.group(3) + ", " + match_nick.group(4) + ", " + match_nick.group(5) + ", " + match_nick.group(6))

    regex_name = (r"([a-zA-z0-9\-\/]+),\s" + x_search_name.get() + ",\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+)")
    pattern_name = re.compile(regex_name)

    with open("Reagent_To_List.txt", "r") as f:
        contents = f.read()
        matches_name = pattern_name.finditer(contents)

        for match_name in matches_name:
            print(match_name)
            return (match_name)

            if match_name.group(2) == x_search_name:
                Search_Results_List.insert(1, match_name.group(1) + ", " + x_search_name.get() + ", " + match_name.group(3) + ", " + match_name.group(4) + ", " + match_name.group(5) + ", " + match_name.group(6))

    regex_part = (r"([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s" + (x_search_part.get()) + ",\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+),\s([a-zA-z0-9\-\/]+)")
    pattern_part = re.compile(regex_part)

    with open("Reagent_To_List.txt", "r") as f:
        contents = f.read()
        matches_part = pattern_part.finditer(contents)

        for match_part in matches_part:
            print(match_part)
            return (match_part)

            if match_part.group(3) == x_search_part:
                Search_Results_List.insert(1, match_part.group(1) + ", " + match_part.group(2) + ", " + x_search_part.get() + ", " + match_part.group(4) + ", " + match_part.group(5) + ", " + match_part.group(6))

    scrollbar = Scrollbar(newwin, orient="vertical")
    scrollbar.config(command=Search_Results_List.yview)
    scrollbar.grid(row=10, column=5, sticky="ns")

    #except:
       # Error_Header = Label(newwin, text="Search Yielded No Results",  width = 30, height = 20, font= ("Times New Roman",20) )
        #Error_Header.grid(row=5, column=4)
        #print(error)


#Buttons____________________________________

New_b = New_Reagent_Button_1(root)
Search_b = Search_Button(root)

button_Edit_Reagent = Button(topFrame, text="Edit Reagent", fg="Black", width = 75, height = 3, relief = RAISED,bd= 18)
button_Delete_Reagent = Button(topFrame, text="Delete Reagent", fg="Red", width = 75, height = 3, relief = RAISED,bd= 18)
button_See_Reagent_List = Button(topFrame, text="See Reagent List", fg="Black", width = 75, height = 3, relief = RAISED,bd= 18)
button_Check_Expired = Button(topFrame, text="Check Expired", fg="Red", width = 75, height = 3, relief = RAISED,bd= 18)
button_Done = Button(topFrame, text="Done", fg="Red", width = 75, height = 3, relief = RAISED,bd= 18,command = root.destroy)


button_Edit_Reagent.grid(row=6, column=0)
button_Delete_Reagent.grid(row=7, column=0)
button_See_Reagent_List.grid(row=9, column=0)
button_Check_Expired.grid(row=11, column=0)
button_Done.grid(row=12, column=0)


root.mainloop()

Demo on 3v4l.org

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