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How can I check if a URL exists via PHP?

...side. Waiting for a response might take time and block code execution. Not all headers returned by get_headers() are well formed. Use curl (if you can). Prevent fetching the entire body/content, but only request the headers. Consider redirecting urls: Do you want the first code returned? Or follow a...
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Maximum length of the textual representation of an IPv6 address?

I want to store the data returned by $_SERVER["REMOTE_ADDR"] in PHP into a DB field, pretty simple task, really. The problem is that I can't find any proper information about the maximum length of the textual representation of an IPv6 address, which is what a webserver provides through $_SERVER...
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How to force cp to overwrite without confirmation

...witch back to Gnome wooed me after Nvidia killed my Fedora install. I'm ¯\_(ツ)_/¯ about it. – Ray Foss Jan 21 '18 at 6:35 ...
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How do I create a unique ID in Java? [duplicate]

... It's not all that human readable tho... – pjp Sep 7 '09 at 14:56 13 ...
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Parallelize Bash script with maximum number of processes

... With GNU Parallel http://www.gnu.org/software/parallel/ you can write: some-command | parallel do-something GNU Parallel also supports running jobs on remote computers. This will run one per CPU core on the remote computers - even if ...
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How can I pass an argument to a PowerShell script?

...te -eq 1) { $iTunes.PlayerPosition = $iTunes.PlayerPosition + $step } Call it with powershell.exe -file itunesForward.ps1 -step 15 share | improve this answer | follow...
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How to improve Netbeans performance?

...pace and 50-80% CPU. Then I decided do some clean up. I had 30 plugins installed, and I was not using most of them. So, I disabled the plugins I was not using, a whopping 19 plug ins I disabled. now memory uses down to 400+ MiB and CPU uses down to 10 and at max to 50%. Now my life is much easier...
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Correct way to pass multiple values for same parameter name in GET request

...s multiple values from this example at w3schools. <form action="/action_page.php"> <select name="cars" multiple> <option value="volvo">Volvo</option> <option value="saab">Saab</option> <option value="opel">Opel</option> <option value="audi"...
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How do you enable “Enable .NET Framework source stepping”?

..." with a greyed out "Browse to find Source"). However, once you've made all the appropriate settings, you can use the following workaround. The workaround is essentially to find the security updates that caused the dll to change, and then remove them. This has the obvious downside of having tho...
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AngularJS ng-style with a conditional expression

... ng-style="{'background-image':'url(../images/'+'{{item.id}}'+'_active.png)','background-size':'52px 57px','padding-top':'70px','background-repeat':'no-repeat','background-position': 'center'}"></span> <span ng-if="selectedItem!=item.id" ng-style="{'back...