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SHA1 vs md5 vs SHA256: which to use for a PHP login?

I'm making a php login, and I'm trying to decide whether to use SHA1 or Md5, or SHA256 which I read about in another stackoverflow article. Are any of them more secure than others? For SHA1/256, do I still use a salt? ...
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How to show Page Loading div until the page has finished loading?

... 5 when redirecting to another page, it keeps in the same page and suddenly displays the desired page, then: show loading pane in prev page bef...
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How to convert int[] into List in Java?

... answered Jul 2 '09 at 11:52 willcodejavaforfoodwillcodejavaforfood 38.4k1717 gold badges7676 silver badges107107 bronze badges ...
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jquery stop child triggering parent event

... Nick Craver♦Nick Craver 580k125125 gold badges12551255 silver badges11351135 bronze badges ...
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Why historically do people use 255 not 256 for database field magnitudes?

You often see database fields set to have a magnitude of 255 characters, what is the traditional / historic reason why? I assume it's something to do with paging / memory limits, and performance but the distinction between 255 and 256 has always confused me. ...
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Android Replace “…” with ellipsis character

... 545 … is the unicode for "…" so just replace it. It's better to have it as one char/sy...
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How to add a new row to datagridview programmatically

... 250 You can do: DataGridViewRow row = (DataGridViewRow)yourDataGridView.Rows[0].Clone(); row.Cells...
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Calling virtual functions inside constructors

... answered Jun 7 '09 at 15:52 JaredParJaredPar 648k133133 gold badges11601160 silver badges13951395 bronze badges ...
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Notepad++ Setting for Disabling Auto-open Previous Files

... 551 For versions 6.6+ you need to uncheck "Remember the current session for next launch" on Settin...