binaryfiles - What is the meaning of \x00 , \x04 in PHP -

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\ x00 और \ x04

हेक्स कोड , इसका क्या अर्थ है? 

  $ str = implode ("\ x00", $ var ['message']); // पंक्ति 1 $ id = $ var ['संदेश'] "\ X04" $ आईडी;  line1 और line2  में क्या होगा

मैं इसे बाइनरी प्रारूप के रूप में एक बाहरी फाइल में लिखना चाहता हूं I

मुझे इस तरह की सभी जानकारी कहां मिलती है।

\ x हेक्साडेसिमल अंकन इंगित करता है देखें:

यह देखने के लिए कि क्या 0x00 और 0x04 का प्रतिनिधित्व करते हैं। 

  0x00 = NULL 0x04 = EOT (संचरण समाप्त)

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